Most seeds come from fruit that naturally free themselves from the shell, but this is not the case in nuts such as hazelnuts, chestnuts, and acorns, which have hard shell walls and originate from a compound ovary. The general and original usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pistachios, and Brazil nuts, are not nuts in a botanical sense. Common usage of the term often refers to any hard-walled, edible kernel as a nut. Nuts are an energy-dense and nutrient-rich food source.

Botanically, a nut is a fruit with a woody pericarp developing from a syncarpous gynoecium. True nuts include, for example, chestnut, hazelnut and filbert. Culinarily, the term 'nut' is used much more widely, and includes examples of drupes (such as pecans and almonds) or seeds (such as pine nuts and peanuts).

Also widely known as nuts are dry drupes, which include pecans, almonds, macadamia (Macadamia integrifolia), candlenut (Aleurites moluccanus) and the water caltrop (Trapa bicornis). A drupe is an indehiscent fruit that has an outer fleshy part consisting of the exocarp, or skin, and mesocarp, or flesh, which surround a single pit or stone, the endocarp with a seed (kernel) inside. In a dry drupe, the outer parts dry up and the remaining husk is part of the ovary wall or pericarp, and the hard inner wall surrounding the seed represents the inner part of the pericarp.

Walnuts and hickories (Juglandaceae) have fruit that are difficult to classify. They are considered to be nuts under some definitions but are also referred to as drupaceous nuts.

In common use, a "tree nut" is, as the name implies, any nut coming from a tree. This most often comes up regarding food allergies; a person may be allergic specifically to peanuts (which are not tree nuts but legumes), whereas others may be allergic to the wider range of nuts that grow on trees.

The sweet potato arrived in Europe with the Columbian exchange. It is recorded, for example, in Elinor Fettiplace's Receipt Book, compiled in England in 1604.

Nuts are eaten by humans and wildlife. Because nuts generally have a high oil content, they are a significant energy source. Many seeds are edible by humans and used in cooking, eaten raw, sprouted, or roasted as a snack food, ground to make nut butters, or pressed for oil that is used in cooking and cosmetics.

Nuts used for food are a common source of food allergens. Reactions can range from mild symptoms to severe ones, a condition known as anaphylaxis, which can be life-threatening. The reaction is due to the release of histamine by the body in response to an allergen in the nuts, causing skin and other possible reactions. Many experts suggest that a person with an allergy to peanuts should avoid eating tree nuts, and vice versa.

The nuts linked to from this page are: acorn; almond; beech nuts; betel nut; brazil nut; bush mango; filbert; ginkgo nut; kola nut; candlenut; cashew; chestnut; coconut; hazelnut; macadamia; ogbono; palm nut; peanut; pecan; pine nut; pistachio; walnut.

The alphabetical list of all the nut-based recipes on this site follows, (limited to 100 recipes per page). There are 3575 recipes in total:

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Guinea Fowl with Coconut Cream      Origin: Zimbabwe	Halibut with Pine Nut and Parmesan Crust      Origin: Britain	Hedgerow Salad      Origin: Ancient
Guinean Avocado Sauce      Origin: Equatorial Guinea	Halloween Cheesecake      Origin: Britain	Helado de Boletus Edulis con Crema de Clitocybe Odora (Penny Bun Ice Cream with Aniseed Toadstool Cream)      Origin: Spain
Guinean Fish Grill with Three Sauces      Origin: Equatorial Guinea	Halo-halo      Origin: Philippines	Hena-Kisoa sy voanjobory (Pork with Bambara Groundnuts)      Origin: Madagascar
Guinean Spinach Sauce      Origin: Equatorial Guinea	Haloua      Origin: Mayotte	Herb Flower Pesto      Origin: Britain
Guinness Cake      Origin: Ireland	Haluwa (Carrot Sweetmeat)      Origin: Tanzania	Herbae Rusticae (Country Herbs)      Origin: Roman
Guisado del Inca (Inca Stew)      Origin: Peru	Halva      Origin: Lebanon	Herodotus' Pudding      Origin: Britain
Gujarati-style Monkfish Curry      Origin: Fusion	Halva de Floarea Soarelui (Sunflower Seed Paste Halva)      Origin: Romania	Hertzoggies      Origin: South Africa
Gulab Jamun      Origin: India	Halvah with Butter      Origin: Albania	Hidden Heart Valentine's Cake      Origin: Britain
Gulab Jamun Cheesecake      Origin: India	Ham and Broccoli Stuffed Potatoes      Origin: Ireland	High Dumpsy Dearie Jam      Origin: England
Gulai Ikan Karibia (Caribbean Fish Stew)      Origin: Turks Caicos	Hami (Fermented Coconut Sauce)      Origin: Tonga	Highland Toffee      Origin: Scotland
Gulai Kambing (Sumatran Goat Curry)      Origin: Martinique	Hares in Talbotes (Hares in Hare-blood Sauce)      Origin: England	Highland Venison Casserole with Chestnuts      Origin: Scotland
Gulai Lemak (Beef Spicy Stew)      Origin: Indonesia	Harina de Maiz (Dominican Cornmeal Porridge)      Origin: Dominican Republic	Himalayan Balsam Seed Curry      Origin: Fusion
Gulha (Fried Fish Balls)      Origin: Maldives	Harvest Soup      Origin: American	Hindle Wakes      Origin: England
Gulha Riha (Maldives Fish Ball Curry)      Origin: Maldives	Haselnußtorte (Hazelnut Torte)      Origin: Germany	Hogmanay Whisky Cake      Origin: Scotland
Gumdrop Fruit Cake      Origin: Canada	Haselnuss Halbmonde (Hazelnut Crescent Biscuits)      Origin: Germany	Hoisin chicken with Noodles      Origin: Fusion
Gummadikaya Majjiga Pulusu (White Pumpkin Yogurt Stew)      Origin: India	Hashwe Stuffing      Origin: Arabia	Hoisin Pork with Garlic Noodles      Origin: China
Gungo Rice and Peas      Origin: Jamaica	Hastletes of Fruyt (Roast Fruit)      Origin: England	Hoisin Sauce      Origin: China
Gurnard Curry      Origin: Britain	Haupia (Hawaiian Coconut Pudding)      Origin: Hawaii	Holiday Eggnog Cheesecake      Origin: American
Gustato pro Ovis (Sauce for Eggs)      Origin: Roman	Havuçlu Toplar (Turkish Carrot Balls)      Origin: Turkey	Home-made Instant Pistachio Pudding Mix      Origin: American
Gutti Vankaya (Stuffed Brinjal Curry)      Origin: India	Hawayij (Yemeni Spice Mix)      Origin: Yemen	Home-made Sichuan Garlic Chilli Oil      Origin: China
Gutweed Salad with Fennel and Orange      Origin: Britain	Hawthorn and Nut Autumn Biscuits      Origin: British	Home-made Vegan Butter      Origin: Britain
Guyana Black Cake      Origin: Guyana	Hazelnut and Garlic Mustard Pesto      Origin: British	Honduran Yucca Cake with Sweet Milk Sauce      Origin: Honduras
Guyana Black Pudding      Origin: Guyana	Hazelnut and Wild Greens Pesto      Origin: Britain	Honey Almond Brittle      Origin: Britain
Guyana White Pudding      Origin: Guyana	Hazelnut Brittle      Origin: Britain	Honey and Catkin Grain Biscuits      Origin: Britain
Guyanese Cook-up Rice and Peas      Origin: Guyana	Hazelnut crêpes with caramelised bananas      Origin: Britain	Honey and Spice Buns      Origin: British
Guyanese Crab Callaloo      Origin: Guyana	Hazelnut Crescents      Origin: Turkmenistan	Honey-roasted Sea Lettuce      Origin: Britain
Guyanese Metemgee      Origin: Guyana	Hazelnut Cupcakes      Origin: Britain	Hong am Rèisleck (Chicken Cooked in Wine)      Origin: Luxembourg
Habichuelas Con Dulce (Dominican Sweet Beans)      Origin: Dominican Republic	Hazelnut Halva      Origin: Fusion	Hong Shao Rou (Red-braised pork belly)      Origin: British
Haddock Supper      Origin: Ireland	Hazelnut Milk      Origin: Britain	Hor Mok Pla Chawnn Bai-Yaw (Steamed Serpent Head Fish Curry with Indian Mulberry Leaf)      Origin: Thailand
Haggis      Origin: Scotland	Hazelnut Nougat      Origin: Britain	Hor Mok Pla Chawnn Bai-Yaw (Steamed Serpent Head Fish Curry with Indian Mulberry Leaf)      Origin: Thailand
Haggis and Pork Sausages with Mash and Red Wine Onion Gravy      Origin: Scotland	Hazelnut Pancakes      Origin: Britain	Horchata de Chufas (Tiger Nut Milk)      Origin: Spain
Hakka Salt-baked Chicken      Origin: China	Hearty Hogmanay Tart      Origin: Scotland	Hot and Sour Soup      Origin: China
Halawa Tahiniya (Sesame Seed Paste Halva)      Origin: Egypt	Heather Biscotti      Origin: Scotland
Halawa Yaqtin (Pumpkin Halwa)      Origin: Middle East	Hedgehog Fungus Risotto      Origin: Britain

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