1/2 c. peanut butter
1/2 c. butter
1 1/2 c. sugar
2 eggs
1 tsp. vanilla
1 c. flour (plain)
1 1/2 tsp. baking powder
1/2 tsp. salt

Grease and flour 9 x 13 x 2-inch pan. Melt peanut butter and butter in bowl over hot water. Add remaining ingredients; stir until blended.

Bake for 25 to 30 minutes in preheated oven at 350°F. Cool; cut into squares.