A thick paste (also known as almond paste) made from ground almonds, sugar and whole egg or egg whites and used in making cakes and pastries. It's used as a topping for simnel cake or as a base for the icing on a Christmas or wedding cake.
Ready-made marzipan is sold in plastic-wrapped blocks in the baking section of most supermarkets.
Marzipan can be made with egg yolk for a richer colour or coloured with food colouring and flavoured, then used to make petits fours. It can be also be moulded into the shape of fruits, vegetables, and so on, to make little sweets.