A chocolate brownie or simply a brownie is a square or rectangular chocolate baked confection. Brownies come in a variety of forms and may be either fudgy or cakey, depending on their density. They may include nuts, frosting, cream cheese, chocolate chips, or other ingredients.
A cupcake is a small cake designed to serve one person, which may be baked in a small thin paper or aluminum cup. As with larger cakes, frosting and other cake decorations such as fruit and candy may be applied.
A cookie is a baked or cooked food that is typically small, flat and sweet. It usually contains flour, sugar, egg, and some type of oil, fat, or butter. It may include other ingredients such as raisins, oats, chocolate chips, nuts, etc.
A biscuit is a flour-based baked food product. They are usually sweet and may be made with sugar, chocolate, icing, jam, ginger or cinnamon. They can also be savoury and similar to crackers.
A tart is a baked dish consisting of a filling over a pastry base with an open top not covered with pastry. The pastry is usually short crust pastry; the filling may be sweet or savoury, though modern tarts are usually fruit-based, sometimes with custard.