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 3695 recipes in total:

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Pesto Petiolata      Origin: Italy	Pistachio Dukkah      Origin: Australia	Plun Pilhi (Green Banana Pilhi)      Origin: Norfolk Island
Petits Gâteaux au Sureau (Elderberry Muffins)      Origin: Switzerland	Pistachio Fudge      Origin: American	Pó de Caril São Tomé (Sao Tomean Curry Powder)      Origin: Sao Tome
Peynirli Künefe (Turkish Cheesecake)      Origin: Turkey	Pistachio Nut Pâté      Origin: Spain	Po'e      Origin: Tahiti
Phali (Young Beet Greens in Walnut Sauce)      Origin: Georgia	Pit Pit in Coconut Cream      Origin: Papua New Guinea	Po'e      Origin: Easter Island
Phirni (Sweet Rice Pudding)      Origin: India	Pit Pit in Coconut Cream      Origin: Fiji	Pochee (Poached Eggs)      Origin: England
Piña Colada Cupcakes      Origin: Britain	Pit Pit in Coconut Cream      Origin: Niue	Podin Bara Amenyn (Bread and Butter Pudding)      Origin: England
Pia Sua (Coconut Pudding)      Origin: Tuvalu	Pit Pit in Coconut Cream      Origin: Papua	Podin Henlys (Helston Pudding)      Origin: England
Pia Sua (Coconut Pudding)      Origin: Solomon Islands	Pit Pit in Coconut Cream      Origin: Samoa	Podin Nadelik (Cornish Stout and Marmalade Christmas Pudding)      Origin: Britain
Pia Sua (Coconut Pudding)      Origin: Kiribati	Pit Pit in Coconut Cream      Origin: Tonga	Poha Chivda (Cabbage Chivda)      Origin: India
Piahia (Coconut Milk Sauce)      Origin: Federated States Micronesia	Pit Pit in Coconut Cream      Origin: Vanuatu	Poisson au Fúmbwa (Fish with Fumbwa)      Origin: Central African Republic
Picau ar y Maen II (Welsh Cakes II)      Origin: Welsh	Pit Pit in Coconut Cream      Origin: Kiribati	Poisson au Lait de Coco (Fish in Coconut Milk)      Origin: Cote dIvoire
Pickled Spiced Acorns      Origin: Britain	Pit Pit in Coconut Cream      Origin: Federated States Micronesia	Poisson aux Coco (Coconut Fish)      Origin: Tanzania
Pig Tail Bouillon with Dumplings      Origin: Saint Lucia	Pit Pit in Coconut Cream      Origin: Cook Islands	Poisson Cru (Tahitian Raw Fish Salad)      Origin: Tahiti
Pigeon Breast with Red Wine Gravy, Roast Leeks and Wild Mushrooms      Origin: Britain	Pit Pit in Coconut Cream      Origin: New Caledonia	Poisson Cru (Wallisian Raw Fish Salad)      Origin: Wallis Futuna
Pilaf-Stuffed Onions      Origin: Middle East	Pit Pit in Coconut Cream      Origin: Wallis Futuna	Poisson Farci à la Saint-Louisienne (Stuffed Fish, in the Manner of St Louis)      Origin: Senegal
Pinafal wedi Piclo (Pickled Pineapples)      Origin: Welsh	Pit Pit in Coconut Cream      Origin: Society Islands	Poisson Yassa (Fish Yassa)      Origin: Senegal
Pindasaus (Dutch Peanut Sauce)      Origin: Netherlands	Pit Pit in Coconut Cream      Origin: Marshall Islands	Poisson Yassa Mauritanienne (Mauritanian Fish Yassa)      Origin: Mauritania
Pineapple and Carnation Fruit Cake      Origin: Britain	Pit Pit in Coconut Cream      Origin: Marquesas Islands	Poissons en sauce aux arachides (Fish in Groundnut Sauce)      Origin: Gabon
Pineapple Pudding      Origin: India	Pitcairn Islands Chicken Curry      Origin: Pitcairn Islands	Poitrine de Porc Grillée à l'Ail (Grilled Belly Pork with Garlic)      Origin: Cote dIvoire
Pineapple Pulissery      Origin: India	Pitcaithly Bannocks      Origin: Scotland	Poke      Origin: Cook Islands
Pineapple Rasmalai      Origin: India	Pittu      Origin: Sri Lanka	Poke      Origin: Tokelau
Pineapple Upside-down Pudding      Origin: British	Pizza Rustica (Italian Easter Ham Pie)      Origin: Ghana	Pokerounce      Origin: England
Pineappleweed and Coconut Ice Lollies      Origin: Britain	Plain Pickled Fiddleheads      Origin: Canada	Pol Sambol      Origin: Sri Lanka
Pineappleweed Jelly      Origin: Scotland	Plantain Gingerbread      Origin: Liberia	Polenta Cake      Origin: British
Pineappleweed Skolebrød      Origin: Scotland	Plantains in Coconut Milk      Origin: South Africa	Polenta Cake with Himalayan Balsam Seeds (Polenta Cake with Himalayan Balsam Seed)      Origin: British
Pintade de Guinée (Guinean Guineafowl)      Origin: Guinea	Plasas (Sierra Leonean Chicken Peanut Stew)      Origin: Sierra Leone	Pollo al Curry con Pasas y Piñones (Chicken Curry with Raisins and Pine Nuts)      Origin: Spain
Pioniono de Arquipe y Coco (Dulce de Leche and Coconut Roll)      Origin: Colombia	Plat Tradicional Fula (Traditional Fulani Dish)      Origin: Guinea-Bissau	Pollo con Salsa de Cacahuetes (Chicken with Peanut Sauce)      Origin: Equatorial Guinea
Pipián (Chicken in Peanut Sauce)      Origin: Philippines	Plov S Mindalyom, Izyumom I Apelsinovoy Tsedroy (Fruit Pilaf)      Origin: Georgia	Pollo Mexicana (Chicken Mexicana)      Origin: Mexico
Piragua      Origin: Puerto Rico	Plum Cake      Origin: Britain	Pom      Origin: Suriname
Pisam Farsilem (Pressed Peas)      Origin: Roman	Plum Crumble      Origin: British	Pomegranate Lokum (Pomegranate Turkish Delight)      Origin: Turkey
Pisces Scorpiones Rapulatos (Scorpion Fish with Turnips in Saffron Sauce)      Origin: Roman	Plum Duff      Origin: England	Pomegranate Molasses Glazed Carrots with Pistachios      Origin: Fusion
Pista Kulfi (Pistachio Ice Cream)      Origin: India	Plum Muffins (Plum Muffins)      Origin: Britain	Ponche de Creme      Origin: Trinidad
Pistachio and White Chocolate Burfi      Origin: Anglo-Indian	Plum Traybake Slices      Origin: Britain
Pistachio and Yoghurt Cake      Origin: Britain	Plun (Banana) Pie      Origin: Pitcairn Islands

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