Toffee and peanut brittle are both types of candy made with sugar, butter, and nuts. The main difference between the two is in their texture. Toffee has a smooth, creamy texture while peanut brittle has a crunchy texture due to its high sugar content. Additionally, toffee typically contains chocolate or other flavorings while peanut brittle does not. Finally, toffee usually requires baking whereas peanut brittle can be cooked on the stovetop without an oven.