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 4553 recipes in total:

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Barzak Shortbreads (Black and White Sesame and Pistachio Biscuits)      Origin: Fusion	Beef Curry with Sweet Potato Noodles      Origin: Fusion	Betas et Polypodiae (Beetroot and Polypody Root)      Origin: Roman
Basanti Pulao (Bengali Pilau Rice)      Origin: India	Beef Curry with Taro      Origin: Vanuatu	Bethmaennchen (German Marzipan Christmas Biscuits)      Origin: Germany
Basbousa      Origin: India	Beef in Bitter      Origin: Britain	Bezar Spice Blend      Origin: Bahrain
Baseema      Origin: Sudan-a	Beef Koftas with Fruity Couscous      Origin: Morocco	Bezar Spice Blend      Origin: UAE
Basic Bonnag      Origin: Manx	Beef Noodles with Oyster Sauce      Origin: China	Bibinka (Savoury Coconut Rice Cake)      Origin: East Timor
Basic Dhokla (Basic Steamed Rice and Dhal Cake)      Origin: India	Beef Rendang      Origin: Indonesia	Bienenstich (Bee Sting)      Origin: Germany
Basic Irish Sausages      Origin: Ireland	Beef Sausages      Origin: British	Bifes com Molho de Amendoim (Veal Steaks with Peanut Sauce)      Origin: Mozambique
Basic Mead Brewing      Origin: Britain	Beef Stock      Origin: Britain	Bifes de Vitela com Molho de Amendoim (Veal Steaks with Peanut Sauce)      Origin: Mozambique
Basil Pesto      Origin: Britain	Beef with Calabash Nutmegs      Origin: Nigeria	Bilberry and Cowberry Pie      Origin: British
Basler Leckerli (Basel Biscuits)      Origin: Switzerland	Beetroot Halwa      Origin: India	Bingsu (Korean Shaved Ice)      Origin: Korea
Bassi (Malian Couscous)      Origin: Mali	Beetroot Sabzi (Beetroot Curry)      Origin: India	Binyewa (Ugandan Groundnut Sauce)      Origin: Uganda
Basundi (Thickened Milk Dessert)      Origin: India	Beetroot-stuffed Parathas      Origin: India	Binyewa (Ugadan Peanut Soup)      Origin: Uganda
Basyniai (Walnut and Fig Cakes)      Origin: Roman	Beigli      Origin: Hungary	Binyewa (Ugandan Peanut Soup)      Origin: Uganda
Batak Raichat (Duck Raichat)      Origin: India	Beignets de Banane au Lait de Coco (Banana Fritters with Coconut Milk)      Origin: Togo	BIR Chicken Chettinad      Origin: Britain
Bath Pudding      Origin: British	Beignets Dougoub (Puffed Millet Doughnuts)      Origin: Senegal	BIR Kashmiri Curry      Origin: Britain
Battenberg      Origin: Britain	Beijino (Coconut Kisses)      Origin: Brazil	BIR Lamb Chettinad      Origin: Britain
Bayerische Schweinekotletts (Bavarian Pork Chops)      Origin: Germany	Beju (Coconut and Cassava Biscuits)      Origin: Nigeria	Bis Riha (Maldives Egg Curry)      Origin: Maldives
Bean and Almond Salad      Origin: South Africa	Belgian Mashed Potatoes      Origin: Belgium	Biscocho de Nueces y Manzana (Apple and Walnut Loaf)      Origin: Ecuador
Bean Foogath      Origin: India	Belizean Bread Pudding      Origin: Belize	Biscotti Mandorle e Pistacchio (Pistachio and Almond Biscuits)      Origin: Italy
Bebotok Sapi (Indonesian Meatloaf)      Origin: Indonesia	Belizean Rice and Beans      Origin: Belize	Biscuit Custard      Origin: British
Bedam ki Burfi (Almond Toffee)      Origin: India	Bengali Hot Dry Meat Curry      Origin: India	Biscuit Pudding      Origin: British
Beech Mast Oil      Origin: Britain	Bengali-style Mango Chutney      Origin: India	Bisgedi Ceirch (Oat Biscuits)      Origin: Welsh
Beech Nut Muffins      Origin: Britain	Beninese Beef Stew      Origin: Benin	Bisgedi Gele (Gele Biscuits)      Origin: Welsh
Beech-nut Flour      Origin: Britain	Beninese Goat Stew      Origin: Benin	Bisgedi Nadolig (Christmas Biscuits)      Origin: Welsh
Beef à la Mode      Origin: British	Berbere Sauce      Origin: Djibouti	Bisort Bolognese      Origin: Fusion
Beef and Coconut Cream Curry      Origin: Fusion	Berenjena con Queso al Horno (Aubergine with Almonds and Cheese)      Origin: Spain	Bizar Spice Blend      Origin: Qatar
Beef and Mushrooms in Peanut Sauce      Origin: Central African Republic	Bergamot, Basil and Almond Pesto      Origin: Fusion	Bizcocho de almendras (Almond Cake)      Origin: Spain
Beef and Pistachio Terrine      Origin: Britain	Beriani      Origin: Brunei	Bizcocho de chufa (Tigernut Cake)      Origin: Spain
Beef Bouilli      Origin: British	Bermuda Chicken Curry      Origin: Bermuda	Black Bean Sauce      Origin: China
Beef Broth with Mutton      Origin: British	Bermuda Rockfish Coconut Curry      Origin: Bermuda	Black Bun      Origin: Scotland
Beef Cameroon      Origin: Cameroon	Bermuda Rockfish with Bananas and Rum Sauce      Origin: Bermuda	Black Cake      Origin: Jamaica
Beef Cecils      Origin: British	Bermudan Plantain Curry      Origin: Bermuda	Black Forest Cheesecake Delight      Origin: American
Beef Chop Suey      Origin: China	Besan Ladoo      Origin: India
Beef Collops      Origin: British	Besan Ladoo      Origin: India

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