Difficulty: Medium - experience needed
1/2 cup peanut butter
1/3 cup margarine, softened
2/3 cup white sugar
1/2 cup brown sugar
1/2 tsp vanilla extract
1 cup flour
1 tsp baking powder
1/2 tsp salt
Preheat oven to 350 degrees F. Grease a 9x9 inch baking pan.
In a bowl cream together peanut butter and margarine. Gradually blend in the brown sugar, white sugar, eggs and vanilla. Mix until fluffy. Combine flour, baking powder, and salt. Stir into the peanut butter mixture until well blended.
Bake for 25-30 minutes in preheated oven. Or until the top springs back with touched. Cool and then cut into squares.