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 3570 recipes in total:

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Puli Pithe      Origin: India	Pwdin Bara Marmalêd (Marmalade Bread and Butter Pudding)      Origin: Welsh	Ragoût aux épinards (Spinach Stew)      Origin: Central African Republic
Pullum Numidicum (Numidian Guinea Fowl)      Origin: Roman	Pwdin Bara Menyn (Bread and Butter Pudding)      Origin: Welsh	Ragoût de Chévre au Riz (Goat Stew with Rice)      Origin: DR-Congo
Pullus Vardanus (Chicken à la Varus)      Origin: Roman	Pwdin Berw Bara Lawr (Laverbread Suet Pudding)      Origin: Welsh	Ragu alla Bolognese (Traditional Bolognese Sauce)      Origin: Italy
Pumpes (Pork Meatballs)      Origin: England	Pwdin Bricyll Siocled (Chocolate Apricot Pudding)      Origin: Welsh	Raj Beef Curry      Origin: Anglo-Indian
Pumpkin and Banana Bread      Origin: England	Pwdin Bricyll Siocled (Chocolate Rhubarb Pudding)      Origin: Welsh	Rangeenak (Persian Date Dessert)      Origin: Iran
Pumpkin and Orange Cake with Cashew Cream      Origin: Britain	Pwdin Briwfwyd (Mincemeat Pudding)      Origin: Welsh	Rapa Nui Dumplings      Origin: Easter Island
Pumpkin and Tomato Soup      Origin: West Africa	Pwdin Eirin Mair Siocled (Chocolate Gooseberry Pudding)      Origin: Welsh	Ras el hanout      Origin: North Africa
Pumpkin Bread      Origin: American	Pwdin Eirin Melyn Siocled (Chocolate Greengage Pudding)      Origin: Welsh	Ras Malai      Origin: India
Pumpkin Brownies      Origin: Britain	Pwdin Ffrwythau'r Berllan (Orchard Fruit Pudding)      Origin: Welsh	Rasabali      Origin: India
Pumpkin Cake      Origin: Liberia	Pwdin Reis Mam (Mum's Rice Pudding)      Origin: Welsh	Rasam      Origin: Southern India
Pumpkin Cheesecake      Origin: Britain	Pwdin Rhiwbob ac Afal Siocled      Origin: Welsh	Rasmalai      Origin: India
Pumpkin Chelsea Buns      Origin: British	Pynnonade (A Dish of Pine Nuts)      Origin: England	Raspberry and White Chocolate Tray Bake      Origin: British
Pumpkin Croquettes      Origin: Fusion	Qabooli Rice      Origin: Oman	Raspberry Jam Shortbreads      Origin: Britain
Pumpkin Crunch      Origin: American	Qatar Baharat Spice Blend      Origin: Qatar	Ratafia Biscuits      Origin: Scotland
Pumpkin Fudge      Origin: American	Qatari Sago Pudding      Origin: Qatar	Raw Seaweed Salad      Origin: Fusion
Pumpkin Hummus      Origin: American	Quaking Pudding      Origin: Britain	Red Chicken Mole      Origin: Mexico
Pumpkin Muffins      Origin: American	Quamar-el-Deen Dessert (Dried Apricot Leather Dessert)      Origin: Bahrain	Red Clover and Almond Biscuits      Origin: Britain
Pumpkin Nutmeg Dinner Rolls      Origin: American	Quarktorte mit Agar-agar (No-bake Quark Cheesecake with Agar-agar)      Origin: Switzerland	Red Curry Cambogee with Meat      Origin: Cambodia
Pumpkin Pie Bars      Origin: American	Quatre Epices      Origin: France	Red Curry Dipping Sauce      Origin: Thailand
Pumpkin Pie Blintzes      Origin: American	Qubbajt (Maltese Nougat)      Origin: Malta	Red Curry Risotto with Prawns      Origin: Fusion
Pumpkin Pie Crumble      Origin: British	Queen of Oude Sauce      Origin: British	Red snapper with Coconut Curry Sauce      Origin: Kiribati
Pumpkin Pie Spice      Origin: American	Queijadinhas Crioulas (Creole Cheesecakes)      Origin: Cape Verde	Red-red with Spiced Plantains      Origin: Ghana
Pumpkin Pilhi      Origin: Pitcairn Islands	Queki Biscuits      Origin: Panama	Redcurrant Cobbler      Origin: America
Pumpkin Pizza      Origin: American	Quemadmodum Sinapis Facias (How to Make Mustard)      Origin: Roman	Redcurrant Muffins      Origin: Britain
Pumpkin Spice Cookies      Origin: American	Queque de Zanahoria (Chilean Carrot Cake)      Origin: Chile	Reform Cake with Almonds      Origin: Serbia
Pumpkin with Nilgiri Sauce      Origin: India	Quiche au thon et légumes (Tuna and Vegetable Quiche)      Origin: Saint Pierre	Rendang Curry Paste      Origin: Fusion
Pumpkin, Goat's Cheese and Kale Tart with Three-cornered Leeks      Origin: Britain	Quiche Dent-de-Lion (Swiss Dandelion Quiche)      Origin: Switzerland	Rendang Daging (Malaysian Beef Rendang)      Origin: Malaysia
Pumpkin, Goat's Cheese and Kale Tart      Origin: British	Quick-as-a-Bunny Easter Egg Nests      Origin: American	Rendang Fish Curry      Origin: Fusion
Punch Coco (Coconut Punch)      Origin: Comoros	Quince and Chestnut Crumble Cake      Origin: Britain	Resalsike (Royal Fruit Stew)      Origin: England
Pur Fayte Ypocras (To Make Hippocras)      Origin: England	Quizaca (Cassava Leaf Stew)      Origin: Angola	Resmolle      Origin: England
Purée d'Aubergines (Aubergine Purée)      Origin: Rwanda	Qumbe (Coconut Squares)      Origin: Somalia	Restaurant-style Butter Chicken      Origin: India
Purée d'Oseille (Hibiscus Leaf Purée)      Origin: Chad	Rüeblitorte (Swiss Carrot Cake)      Origin: Switzerland	Restaurant-style Monkfish Curry      Origin: Britain
Puri (Indian Balloon Bread)      Origin: India	Rad Na Moo (Pork with Noodles in Gravy)      Origin: Thailand
Pwdin Bara (Bread Pudding)      Origin: Welsh	Ragi Rava Ladoo      Origin: India

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