Food Science Series

Let’s talk about the foods we eat!

A ring displaying different types of foods
Food Science Series: A food scientist
  • Based on the plant’s biological structure and reproductive features
  • Scientifically rigorous and consistent across cultures
  • Categorizes plant parts based on their function in the plant’s life cycle
  • Example: Tomatoes are classified as fruits because they develop from the ovary of a flowering plant and contain seeds
  • Based on how the food is used and perceived in cooking and eating
  • Can vary between cultures and culinary traditions
  • Categorizes foods based on flavor profile, cooking methods, and role in meals
  • Example: Tomatoes are typically used as vegetables in cooking due to their savory flavor and use in main courses
  1. Purpose: Botanical classification serves scientific purposes, while culinary classification is practical for cooking and meal planning.
  2. Consistency: Botanical classification is more consistent globally, while culinary classification can vary regionally.
  3. Criteria: Botanical classification uses structural and genetic criteria, whereas culinary classification considers flavor, texture, and culinary use.
  4. Overlaps: Many plant foods have different botanical and culinary classifications, leading to common misconceptions (e.g., tomatoes, cucumbers, and bell peppers are botanically fruits but culinarily vegetables).

This discrepancy between botanical and culinary classifications often leads to the familiar debate of whether certain foods are fruits or vegetables, highlighting the difference between scientific definition and practical usage in everyday life.

For those of you who would like to know what the science words for the part of the plant you are eating:

Botanical Fruit Types and Plant Structures:

  1. Aggregate fruit: Formed from multiple ovaries of a single flower.
    Examples: raspberries, blackberries, strawberries
  2. Berry: A fleshy fruit with seeds embedded in the flesh, typically without a stone.
    Examples: blueberries, tomatoes, grapes, bananas
  3. Bulb: A short underground stem surrounded by fleshy leaves used for food storage.
    Examples: onions, garlic
  4. Capsule: A dry fruit that splits open when ripe to release its seeds.
    Examples: poppy seeds, sesame seeds
  5. Corm: A short, vertical, swollen underground stem used for food storage.
    Examples: taro, water chestnut
  6. Drupe: A fleshy fruit with a single seed surrounded by a hard shell (pit).
    Examples: peaches, plums, cherries, olives
  7. Flower bud: An undeveloped or unopened flower.
    Examples: artichokes, broccoli, cauliflower
  8. Fruit (general): The seed-bearing structure in flowering plants that develops from the ovary after flowering.
    Examples: This includes all the specific fruit types mentioned here (drupes, berries, etc.)
  9. Grain: A small, dry, one-seeded fruit of cereal grasses, often used as a food source.
    Examples: wheat, rice, corn
  10. Hesperidium: A specific type of berry with a leathery rind and juicy pulp divided into segments.
    Examples: oranges, lemons, grapefruits
  11. Leaf: The main organ of photosynthesis and transpiration in plants.
    Examples: lettuce, spinach, kale
  12. Legume: A fruit that develops from a single carpel and typically splits along two seams.
    Examples: peas, beans, peanuts
  13. Multiple fruit: Developed from a cluster of separate flowers.
    Examples: pineapples, figs
  14. Nut: A dry, hard-shelled fruit containing a single seed.
    Examples: acorns, chestnuts, hazelnuts
  15. Pepo: A type of berry with a hard outer rind, seeds attached to the ovary wall.
    Examples: cucumbers, pumpkins, watermelons
  16. Pome: A fleshy fruit with a core containing seeds, derived from the flower’s receptacle.
    Examples: apples, pears, quince
  17. Rhizome: A horizontal underground stem that can produce shoots and roots.
    Examples: ginger, turmeric
  18. Root: The underground part of a plant that absorbs water and nutrients.
    Examples: carrots, beets, radishes
  19. Seed: The unit of reproduction of a flowering plant, capable of developing into another plant.
    Examples: sunflower seeds, pumpkin seeds, chia seeds
  20. Stem: The main body or stalk of a plant.
    Examples: asparagus, celery, rhubarb
  21. Tuber: A swollen underground stem used for food storage by the plant.
    Examples: potatoes, yams

Armed with this knowledge, you can impress your friends with fun food facts at your next dinner party!

Some plants are botanically classified as fruits but are used culinarily as vegetables. This often leads to confusion. Examples include:

  • Tomatoes
  • Cucumbers
  • Bell peppers
  • Eggplants
  • Squash (including zucchini, pumpkins, butternut squash)
  • Okra
  • Avocados
  • Green beans (including string beans and wax beans)
  • Chili peppers
  • Tomatillos
  • Corn kernels (technically a fruit and a grain)
  • Olives
  • Peas (green peas, snow peas, snap peas)

These are all botanically classified as fruits because they develop from the ovary of flowering plants and contain seeds. However, they’re typically used in savory dishes and are treated as vegetables in cooking.

The distinction between fruits and vegetables is often blurred in culinary use, and many people are surprised to learn that some of their favorite “vegetables” are actually fruits from a botanical perspective. This discrepancy between botanical classification and culinary usage is a common source of confusion in discussions about food classification.

Is there any specific fruit-vegetable you’d like more information about? These are all fruits in botanical terms because they develop from the flower of the plant and contain seeds. However, they’re typically used in savory dishes and are treated as vegetables in cooking.

A group of root vegetables and spices

Some edible roots are considered vegetables, while others are used as herbs or spices. This classification often depends on how they’re used in cooking:

  • Carrots
  • Potatoes (including sweet potatoes and yams)
  • Turnips
  • Beets
  • Parsnips
  • Radishes
  • Rutabagas
  • Cassava (also known as yuca)
  • Celeriac (celery root)
  • Jicama
  • Kohlrabi
  • Daikon
  • Salsify
  • Taro
  • Jerusalem Artichokes (sunchokes)
  • Ginger
  • Tumeric
  • Horseradish
  • Galangal
  • Wasabi
  • Licorice root
  • Maca
  • Burdock root
  • Angelica root
  • Chicory root
  • Garlic (while the bulb is used, it’s botanically a modified stem)
  • Onions (also botanically a modified stem)

The distinction here is mainly based on quantity and purpose in cooking. Root vegetables are often used in larger amounts as substantial parts of a meal, while root herbs and spices are used in smaller quantities primarily for their intense flavors.

This overlap between categories demonstrates that culinary classifications don’t always align with botanical definitions, and usage often determines how we categorize these plants in everyday cooking.

It’s worth noting that some roots can be used both as main ingredients and as herbs/spices, depending on the quantity used and the culinary context. For example, garlic and onions are often used in large quantities as main ingredients, but can also be used in smaller amounts for flavoring.

A bushel of colorful vegetables

Vegetables

Botanically Correct

Vegetables are edible parts of plants that are typically savory rather than sweet.

  • This category includes leaves, stems, roots, flowers, and sometimes fruits that are used in savory dishes.
  • Vegetables are usually the parts of the plant that don’t contain seeds, though there are exceptions (like peas).
  • They’re often used as main ingredients in meals and are valued for their nutritional content.
A basket of colorful fruit

Fruits

Botanically Correct

Fruits are typically the sweet or tart parts of plants that contain seeds.

In botanical terms, fruits are the mature ovaries of flowering plants.

  • They often develop from flowers and are meant to distribute seeds.
  • Many fruits we eat are sweet, but some culinary fruits like tomatoes and cucumbers are used as vegetables in cooking.
A wooden box of herbs and spices

Herbs & Spices

Botanically Correct

Herbs and Spices are plant parts used primarily for flavoring food, rather than as main ingredients.

  • Herbs are usually the leafy green parts of the plant.
    • They can be used fresh or dried and often have mild to strong flavor.
    • Examples include basil, chives, and parsley.
  • Spices are typically made from other parts of plants, such as seeds, bark, roots, or fruits.
    • They’re usually dired and have intense flavors.
    • Examples include ginger, turmeric, and anise.

Both herbs and spices are used in small quantities to add flavor, aroma, and/or color to dishes.

A wooden box displaying nuts and seeds

Nuts & Seeds

Botanically Correct

Nuts and seeds are typically small, nutrient-dense plant products that are often eaten on their own as snacks or used in cooking to add flavor, texture, and nutritional value.

  • Nuts are technically fruits consisting of a hard shell and an edible seed.
    • They are usually high in healthy fats, protein, and various nutrients.
    • Examples include almonds, walnuts, and pecans.
  • Seeds are the small, edible products of plants that are used to grow new plants.
    • They are often rich in protein, healthy fats, and various micronutrients.
    • Examples include sunflower seeds, pumpkin seeds, and chia seeds.
  • Some culinary nuts are botanically seeds or other plant parts.
    • For example, peanuts are legumes, and pine nuts are seed kernels.

Both nuts and seeds are used in a variety of culinary applications, from snacking to baking, and as ingredients in both sweet and savory dishes. They can be eaten raw, roasted, or incorporated into other foods, and are valued for their flavor, texture, and nutritional benefits.

Fruits often used as vegetables:

  • Acorn squash (pepo)
  • Angled luffa (fruit)
  • Apple gourd (pepo)
  • Armenian cucumber (accessory fruit)
  • Aubergine/Eggplant (berry)

Vegetables sometimes used as fruits:

  • There really aren’t any for the letter “A”

Plants with multiple edible parts or uses:

  • Alfalfa (sprouts as vegetable, seeds as herb/spice)
  • Amaranth (leaves as vegetable, seeds as grain)
  • Angelica (root and seed as spice, stem as vegetable)
  • Anise hyssop (leaves and flowers as herb, seeds as spice)
  • Avocado (fruit as vegetable, leaf as herb)

Acorns: While not commonly eaten in many cultures, they are used as a food source in some regions after proper processing to remove tannins.

African walnut: Not related to true walnuts, but used similarly in its native regions.

Almonds: Although botanically the seed of a drupe, they’re widely considered and used as nuts in culinary contexts.

Anacardium: This family includes the cashew nut (Anacardium occidentale) and the less known pili nut (Canarium ovatum).

Fruits often used as vegetables:

  • Banana squash (fruit)
  • Bell peppers (fruit)
  • Bitter melon (fruit)
  • Bottle gourd (fruit)
  • Breadfruit (fruit)
  • Butternut squash (fruit)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “B” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Banana (fruit eaten fresh, leaves used for wrapping)
  • Beets (root as vegetable, leaves as vegetable, sometimes root used in sweet applications)
  • Borage (leaves and flowers as herb, seed oil used medicinally)

Fruits often used as vegetables:

  • Calabaza (fruit)
  • Cucumber (fruit)
  • Cucumber (fruit)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “C” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Caper (flower buds as condiment, leaves as vegetable)
  • Cardoon (stems as vegetable, flowers as rennet substitute)
  • Carrot (root as vegetable, sometimes in sweet dishes; leaves as herb)
  • Celery (stalks and leaves as vegetable, seeds as spice)
  • Chicory (leaves as vegetable, roots as coffee substitute)
  • Citrus fruits (fruit as fruit, peel as zest/flavoring)
  • Coconut (fruit as fruit and oil, water as beverage)

Fruits often used as vegetables:

  • Durian (fruit, sometimes used in savory dishes)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “D” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Dandelion (leaves as vegetable, roots as coffee substitute, flowers for wine)
  • Dill (leaves as herb, seeds as spice)

Fruits often used as vegetables:

  • Eggplant/Aubergine (berry)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “E” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Elderberry (berries as fruit, flowers as flavoring or tea)

Fruits often used as vegetables:

  • Fava beans (seed pods and seeds)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “F” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Fennel (bulb as vegetable, fronds as herb, seeds as spice)
  • Fig (fruit as fruit, leaves sometimes used for wrapping food)

Fruits often used as vegetables:

  • Green beans (immature pods)
  • Green bell peppers (fruit)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “G” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Garlic (bulb as vegetable/spice, leaves sometimes used as herb)
  • Ginger (rhizome as spice, young shoots sometimes used as vegetable)

Fruits often used as vegetables:

  • Habanero pepper (fruit, used as a vegetable/spice)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “H” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Hops (flowers used in brewing, young shoots sometimes eaten as a vegetable)

Fruits often used as vegetables:

  • Note: There are no common fruits starting with “I” that are typically used as vegetables

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “I” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Indian gooseberry/Amla (fruit used as fruit and in medicine, leaves sometimes used medicinally)

Fruits often used as vegetables:

  • Jackfruit (fruit, young unripe fruit used as a vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “J” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Juniper (berries used as spice, young shoots sometimes eaten)

Fruits often used as vegetables:

  • Kohlrabi (stem, used as a vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “K” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Kaffir lime (leaves used as herb, fruit zest and juice used in cooking)

Fruits often used as vegetables:

  • Malabar gourd (fruit, used as a vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “M” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Moringa (leaves, seed pods, and seeds used as vegetables; roots used as a spice)

Fruits often used as vegetables:

  • Nopales (cactus pads, botanically a stem but used as a vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “N” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Nasturtium (leaves and flowers used as herb, seeds sometimes pickled like capers)

Fruits often used as vegetables:

  • Okra (fruit pod, used as a vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “O” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Olive (fruit used as fruit and for oil, leaves sometimes used medicinally)

Fruits often used as vegetables:

  • Note: There are no common fruits starting with “Q” that are typically used as vegetables

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “Q” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Quince (fruit used as fruit, seeds sometimes used medicinally)

Fruits often used as vegetables:

  • Note: There are no common fruits starting with “R” that are typically used as vegetables

Vegetables sometimes used as fruits:

  • Rhubarb (leaf stalks, botanically a vegetable but often used as a fruit)

Plants with multiple edible parts or uses:

  • Rocket/Arugula (leaves used as salad green, seeds sometimes used to make oil)

Ramps (Allium tricoccum), also known as wild leeks, are a vegetable. They’re a type of wild onion that’s popular in certain regions, particularly in Appalachian cuisine. Both the bulb and the leaves are edible and have a strong, garlicky-onion flavor.

Red rice yeast is used in Chinese cuisine for flavoring, coloring, and preserving foods. It’s also used in traditional Chinese medicine and has been studied for its potential cholesterol-lowering effects.

We currently don’t have any items starting with “R” in the Nuts and Seeds category.

Fruits often used as vegetables:

  • Tomato (fruit used as vegetable)
  • Tomatillo (fruit used as vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “T” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Taro (corm used as vegetable, leaves sometimes eaten)

Fruits often used as vegetables:

  • Note: There are no common fruits starting with “U” that are typically used as vegetables

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “U” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Ulluco (tuber used as vegetable, leaves sometimes eaten)

Note: There are no common herbs or spices starting with “U”

Note: There are no common nuts or seeds starting with “U”

Fruits often used as vegetables:

  • Note: There are no common fruits starting with “V” that are typically used as vegetables

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “V” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Vanilla (fruit used as spice, leaves sometimes used for flavoring)

Fruits often used as vegetables:

  • Winter squash (fruit used as vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “W” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Wasabi (rhizome used as spice, leaves sometimes eaten)

Fruits often used as vegetables:

  • Note: There are no common fruits starting with “X” that are typically used as vegetables

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “X” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Note: There are no common plants starting with “X” with multiple edible parts

Note: There are no common vegetabes starting with “X

Note: There are no common herbs or spices starting with “X

Note: There are no common nuts or seeds starting with “X”

Fruits often used as vegetables:

  • Note: There are no common fruits starting with “Y” that are typically used as vegetables

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “Y” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Yacon (root used as vegetable, leaves sometimes used for tea)

Yuca, also known as cassava or manioc, is an important root vegetable. It’s a staple food in many tropical and subtropical regions. Here’s a bit more detail:

Yuca/Cassava (Manihot esculenta):

  • Edible part: root
  • Botanical classification: root vegetable
  • Culinary use: used as a starchy vegetable, can be boiled, fried, or used to make flour

Note: There are no common nuts or seeds starting with “Y”

Fruits often used as vegetables:

  • Zucchini (fruit used as vegetable)

Vegetables sometimes used as fruits:

  • Note: There are no common vegetables starting with “Z” that are typically used as fruits

Plants with multiple edible parts or uses:

  • Note: There are no common plants starting with “Z” with multiple widely used edible parts