A pie is a baked dish which is usually made of a pastry dough that contains a filling of various sweet or savoury ingredients. Sweet pies may be filled with fruit (as in an apple pie), nuts (walnut pie) or with thicker fillings based on eggs and dairy. Savoury pies may be filled with meat, eggs and cheese.

Pies can be a variety of sizes, ranging from bite-size to ones designed for multiple servings.