130g peanut butter
75g margarine, softened
125g caster sugar
110g brown soft sugar
1/2 teaspoon vanilla extract
125g plain flour
1 teaspoon baking powder
1/4 teaspoon salt
Preheat oven to 180 C / Gas 4 and grease a 23cm square baking tin.
In a medium bowl, cream together peanut butter and margarine.
Gradually blend in the brown soft sugar, caster sugar, eggs and vanilla, mix until fluffy.
Combine flour, baking powder and salt; stir into the peanut butter mixture until blended.
Bake for 30 – 35 minutes in the oven, or until the top springs back when touched.
Cool, and cut into 12 squares.