Biscuits are a baked product, usually made from wheat flour together with fat and sugar. They are made in a variety of shapes and sizes and may contain dried fruits, nuts and food colours. They are a dry product, usually with a golden brown colour and a crisp texture. Savoury biscuits can be made by omitting the sugar and adding salt, herbs, spices and cheese. Cakes are available in many shapes and styles. The simplest cakes have a light spongy texture and are made by beating together fat and sugar, adding eggs and flour. The cake mixture is beaten to incorporate air, which makes the sponge light and airy. Flour is gently added to bind together the creamed butter sugar and egg mixture.