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 3598 recipes in total:

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Chinese Crispy Duck      Origin: China	Christmas Biscotti with Lemon and Mixed Spice      Origin: Italy	Clapshot      Origin: Scotland
Chinese Curried Chicken with Peppers      Origin: China	Christmas Bunloaf      Origin: Manx	Classic Rice Pudding      Origin: Britain
Chinese Five-spice Spare Ribs      Origin: China	Christmas Cake      Origin: Britain	Clementine Cake      Origin: Britain
Chinese Pork and Mushroom Meatballs Soup      Origin: Fusion	Christmas Cheesecake      Origin: Britain	Clitocybe Odora Fritta (Fried, Breaded, Aniseed Toadstool)      Origin: Italy
Chinese Vegetable Soup      Origin: China	Christmas Crumble      Origin: Britain	Clotted Cream Splits      Origin: England
Chinese-style Takeaway Curry Sauce      Origin: China	Christmas Gingerbread Biscuits      Origin: British	Cobnut Fairy Cakes      Origin: British
Chocnut Logs      Origin: British	Christmas Glögg (Christmas Glogg)      Origin: Sweden	Cobnut Pesto      Origin: British
Choco Pistachio Rolls      Origin: India	Christmas Island Beriani      Origin: Christmas Island	Cobnut Stuffing      Origin: Britain
Chocolate Almond Galettes      Origin: British	Christmas Island Crab Rendang      Origin: Christmas Island	Cobnut Stuffing for Goose      Origin: Britain
Chocolate Amaretto Cheesecake      Origin: American	Christmas Mice      Origin: American	Coca de San Juan (St James Cake)      Origin: Spain
Chocolate and Hawthorn Flour Cake      Origin: British	Christmas Morning Bread      Origin: American	Coca Mallorquina (Spanish Pizza)      Origin: Spain
Chocolate and Wild Flour Blend Cake      Origin: American	Christmas Plum Pudding      Origin: Northern Ireland	Cocadas (Coconut Bars)      Origin: Ecuador
Chocolate Babka      Origin: Ukraine	Christmas Plum Pudding      Origin: Jamaica	Cocktail de Crevettes (Senegalese Prawn Cocktail)      Origin: Senegal
Chocolate Blancmange      Origin: British	Christmas Pudding Truffles      Origin: Britain	Cocoa Cobnuts      Origin: Britain
Chocolate Caramel Pecan Cheesecake      Origin: American	Christmas Sundaes      Origin: Scotland	Cocoa Nib Curried King Prawns      Origin: American
Chocolate Cheesecake 2      Origin: American	Christmas Sweet Chestnut Soup      Origin: Britain	Cocoa Pistachio Pinwheels      Origin: American
Chocolate Chip Cookies      Origin: American	Christmas Walnut and Mincemeat Cheesecake      Origin: Britain	Cocoda (Aruban Coconut Candy)      Origin: Aruba
Chocolate Christmas Cake      Origin: British	Chrov Plav (Rice Pilaf with Dried Fruit and Nuts)      Origin: Azerbaijan	Coconetes (Dominican Rustic Coconut Biscuits)      Origin: Dominica
Chocolate Doberge Cake      Origin: Cajun	Chu Hou Paste      Origin: Hong Kong	Coconut and Apricot Fudge Squares      Origin: New Zealand
Chocolate Drop Cakes      Origin: Britain	Chuchkella (Grape and Walnut Candies)      Origin: Azerbaijan	Coconut and Mango Cheesecake      Origin: Britain
Chocolate Kulfi      Origin: India	Chuoereg (Armenian Easter Bread)      Origin: Armenia	Coconut and Maraschino Cherry Cake      Origin: Britain
Chocolate Meringue Cupcakes      Origin: Britain	Churah Gerthe (Rice and Peanut Porridge)      Origin: Gambia	Coconut Bean Rice      Origin: Nigeria
Chocolate Orange Fudge      Origin: British	Churra Gertehe (Peanut and Rice Porridge)      Origin: Gambia	Coconut Biscuits      Origin: Philippines
Chocolate Panforte      Origin: Italy	Churros (Fried Choux Pastries)      Origin: Spain	Coconut Biscuits      Origin: Macau
Chocolate Peanut Butter Ginseng Cookies      Origin: American	Chykenes in Grauey (Chickens in Gravy)      Origin: England	Coconut Bread Pudding      Origin: St Helena
Chocolate Ripple Ice Cream      Origin: British	Chykenes in Gravey (Chicken in Gravy)      Origin: England	Coconut Candy      Origin: Liberia
Chocolate Rough Slice      Origin: New Zealand	Chyryse      Origin: England	Coconut Chickpea Curry with Spinach      Origin: Britain
Chocolate Truffles      Origin: Britain	Chysanne (A Dish to be Eaten Cold)      Origin: England	Coconut Chickpea Dumpling Curry      Origin: Britain
Chocolate Turtle Cheesecake      Origin: American	Cinnamon Buttercream Icing      Origin: American	Coconut Chocolate Cheesecake      Origin: American
Chocolate-dipped Stuffed Dates      Origin: Fusion	Cinnamon Spiced Jollof Rice      Origin: Sierra Leone	Coconut Chutney      Origin: India
Chocolate-ginger Boiled Puddings      Origin: Canada	Cinnamon Stars      Origin: British	Coconut Collard Greens      Origin: Puerto Rico
Chop Suey      Origin: Fusion	Cinq Centimes (Five-cent Biscuit)      Origin: Senegal	Coconut Crab Curry      Origin: Christmas Island
Chremzel (Sweet Matzo Pancakes)      Origin: Poland	Citrusy Ripe Breadfruit Cake      Origin: Saint Lucia
Christmas Bannock      Origin: Scotland	Clafoutis aux Fleurs Sauvages (Wildflower Clafouti)      Origin: France

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