A muffin tin, or muffin tray, is a mold used form muffins or cupcakes while baking. A typical muffin tin has room for 12 muffins, with each cup holding about 3.5 ounces. Other size tins are available that hold anywhere from 6 to 35 muffins.

Modern tins are often made of aluminum, cast iron, stainless steel, or flexible silicone. The steel and aluminum tins are usually coated with a non-stick material such as Teflon. Paper cup liners can also be used.