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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Rhiwbob wedi Piclo (Pickled Rhubarb)      Origin: Welsh	Riz au Gras (Ivorian Fat Rice)      Origin: Cote dIvoire	Rout Cakes      Origin: British
Rhubarb and Apple Crumble with Toasted Nuts      Origin: Britain	Riz au Gras Ivorienne (Ivorian Fat Rice)      Origin: Cote dIvoire	Royal Beef Biryani      Origin: India
Rhubarb and Elderflower Cake      Origin: Britain	Riz au Lait de Coco de Comores (Comorian Rice with Coconut Milk)      Origin: Comoros	Ruggata (Almond Barley Water Cordial)      Origin: Malta
Rhubarb and Ginger Crumble      Origin: Italy	Riz au lait et caramel beurre salé (Rice pudding and salted butter caramel)      Origin: Senegal	Rujak Brunei (Spiced Fruit Salad)      Origin: Brunei
Rhubarb and Walnut Muffins      Origin: American	Riz aux Oignons (Rice with Onions)      Origin: Congo	Rukau      Origin: Cook Islands
Rhubarb Crumble      Origin: Britain	Riz Balkbdh (Rice with Liver)      Origin: Egypt	Rukau      Origin: Tokelau
Rhubarb-Pecan Muffins      Origin: Britain	Riz Jollof du Niger (Niger-style Jollof Rice)      Origin: Niger	Rukau      Origin: Tuvalu
Ribnoye Kharcho (Salmon and Walnut Soup)      Origin: Georgia	Rizzolletti      Origin: British	Rum and Chocolate Cupcakes      Origin: Britain
Ricciarelli (Sienese Christmas Biscuits)      Origin: Italy	Roast Chestnuts      Origin: Britain	Rum And Coconut Bread Pudding      Origin: Cayman Islands
Rice à la Sœur Nightingale      Origin: British	Roast Lamb with Pesto Stuffing      Origin: Britain	Rum Balls      Origin: Aruba
Rice and Peas      Origin: Jamaica	Roast Pheasant with Cobnut Butter      Origin: Britain	Rum Raisin Cheesecake      Origin: Britain
Rice and Peas      Origin: Saint Kitts	Roast Potato Gnocchi      Origin: Britain	Russian Sauce      Origin: Britain
Rice and Sesame Seed Soup      Origin: Sierra Leone	Roast Pumpkin      Origin: British	Russian Soup, or Tschi      Origin: British
Rice Cakes      Origin: Federated States Micronesia	Roast Quince Fool with Madeira      Origin: South Africa	Rwandan Beef Stew      Origin: Rwanda
Rice Flummery      Origin: Britain	Roast Vegetables      Origin: England	Rwlâd Bara Lawr (Laverbread Roulade)      Origin: Welsh
Rice Krispies Easter Eggs      Origin: American	Roasted breadfruit and smoked herring      Origin: Saint Lucia	Rygh in sauce (Ruffe in Sauce)      Origin: England
Rice Paper Wrappers      Origin: Vietnam	Roasted fish with Eluit el Tuu      Origin: Palau	Rys (Rice)      Origin: England
Rice Pudding Muffins (Rice Pudding Muffins)      Origin: Britain	Roasted Hazelnuts      Origin: Britain	Ryse of Flesh (Rice Accompaniment)      Origin: England
Rice Pudding Pasty      Origin: England	Roasted Maize      Origin: Nigeria	Saagwala Murg (Chicken Saagwala)      Origin: India
Rice Pudding with Meadowsweet and Compote of Wild Cherries      Origin: Britain	Robinson      Origin: Martinique	Saak-er Ghanto      Origin: Bangladesh
Rice Puddings      Origin: British	Rochers Congolaise (Congolese Rock Cakes)      Origin: Congo	Saba Callaloo      Origin: Saba
Rice Sticks with Beef in Black Bean Sauce      Origin: China	Rocky Road Crunch Bars      Origin: British	Saba Pigeon Pea Stew      Origin: Saba
Rice with Oil      Origin: Zambia	Rocoto Rellenos (Stuffed Rocoto Chillies)      Origin: Peru	Saban Curry Conch (Saban Curry Conchs)      Origin: Saba
Rice, Milanese Fashion      Origin: British	Rogan Josh Masala      Origin: Britain	Sabat Moong Bhajji (Mung Bean Bhaji)      Origin: India
Rice, Raisin and Almond Stuffed Miniature Pumpkins      Origin: American	Rolled Loin of Mutton      Origin: British	Sabudana Kheer (Tapioca Pudding with Saffron and Nuts)      Origin: India
Rich and Dark Christmas Cake      Origin: Britain	Roman Gnocchi      Origin: Britain	Sabut Garam Masala      Origin: India
Rich Chocolate Cake      Origin: Britain	Roof Tile Crackers      Origin: Britain	Sacha Sauce      Origin: Taiwan
Rich Fruit Cake      Origin: Britain	Rooibos Poached Pears      Origin: South Africa	Sack Posset      Origin: Britain
Rich Manx Bunloaf      Origin: Manx	Rose and Pistachio Tres Leches      Origin: Fusion	Saddle of Mutton à la Polonaise      Origin: British
Rich Sauce      Origin: British	Rose Hip Nut Bread      Origin: British	Saffe (Mutton and Cassava Leaf Stew)      Origin: Sierra Leone
Ris à l'Amande (Danish Almond Rice Pudding)      Origin: Denmark	Rose Petal Drop Scones      Origin: Britain	Saffron Black Cardamom Fudge      Origin: Pakistan
Risgrynsgröt (Swedish Rice Pudding)      Origin: Sweden	Rosee (Rose Pudding)      Origin: England	Saffron Bread      Origin: England
Riskrem (Rice Cream)      Origin: Norway	Roulade Sévigné (Sévigné Roulade)      Origin: France
Risotto alla Arancia (Risotto with Orange)      Origin: Italy	Rourou Balls      Origin: Fiji

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