A pancake, also known as a hotcake, griddlecake, or flapjack, is a flat type of batter bread like cake, often thin and round, prepared from a starch-based batter that may contain eggs, milk, and butter, and then cooked on a hot surface such as a griddle or frying pan. Archaeological evidence suggests that pancakes were probably eaten in prehistoric societies.

The pancake's shape and structure varies worldwide. In England, pancakes are often unleavened and are thin. In Scotland and North America, a leavening agent is used (typically baking powder) creating a thick fluffy pancake. A crêpe is a thin pancake of Breton origin cooked on one or both sides in a special pan or crepe maker to achieve a lacelike network of fine bubbles. A well-known variation originating from southeast Europe is palatschinke, a thin moist pancake fried on both sides and filled with jam, cream cheese, chocolate, or ground walnuts, but many other fillings—sweet or savoury—can also be used.

Commercially prepared pancake mixes are available in some countries. Like waffles, commercially prepared frozen pancakes are available from companies like Eggo. When buttermilk is used in place of or in addition to milk, the pancake develops a tart flavor and becomes known as a buttermilk pancake, which is common in Scotland, Ireland and the US. Buckwheat flour can be used in a pancake batter, making for a type of buckwheat pancake, a category that includes blini, kaletez, ploye, and memil-buchimgae. When potato is used as a major portion of the batter, the result is a potato pancake.

Pancakes may be served at any time of the day or year with a variety of toppings or fillings, but they have developed associations with particular times and toppings in different regions. In North America, they are typically considered a breakfast food and serve a similar function to waffles. In Britain and the Commonwealth, they are associated with Shrove Tuesday, commonly known as "Pancake Day", when, historically, perishable ingredients had to be used up before the fasting period of Lent.

The Ancient Greeks made pancakes called τηγανίτης (tēganitēs), ταγηνίτης (tagēnitēs) or ταγηνίας (tagēnias), all words deriving from τάγηνον (tagēnon), "frying pan". The earliest attested references to tagenias are in the works of the 5th-century BC poets Cratinus and Magnes. Tagenites were made with wheat flour, olive oil, honey, and curdled milk, and were served for breakfast. Another kind of pancake was σταιτίτης (staititēs), from σταίτινος (staitinos), "of flour or dough of spelt", derived from σταῖς (stais), "flour of spelt". Athenaeus mentions, in his Deipnosophistae, staititas topped with honey, sesame, and cheese. The Middle English word pancake appears in English in the 15th century.

The Ancient Romans called their fried concoctions alia dulcia, Latin for "other sweets". These were much different from what are known as pancakes today.

Pancakes in the Horn of Africa (Djibouti, Eritrea, Ethiopia and Somalia) are known as injera (sometimes transliterated as enjera, budenaa (Oromo), or canjeero (Somali)). Injera is a yeast-risen flatbread with a unique, slightly spongy texture. Traditionally, it is made out of teff flour and is a national dish in Ethiopia and Eritrea. Canjeero, also known as lahooh or lahoh, is a similar kind of flatbread eaten in Somalia and Yemen.

In Eritrea and Ethiopia, injera are usually served with one or more stews known as wat or with salads (especially, for instance, during periods of Ethiopian Orthodox fasting) or with other injera (injera firfir). The right hand is used to tear small pieces from the injera to use to pick up and eat the stews or salads. The injera under these stews soaks up juices and flavours and, after the stews and salads are finished, is also consumed. Injera thus acts simultaneously as food, eating utensil, and plate. When the "tablecloth" formed by the injera is finished, the meal is over.