1 lb. powdered sugar
1/4 c. evaporated milk
1/2 stick butter

Put sugar, milk, and butter in a bowl (do not mix); heat in the microwave for 3 to 3 1/2 minutes or until butter is very soft. Stir gently to mix. Add 1 tablespoon vanilla, 1/2 cup chopped nuts and 1/4 cup peanut butter. Mix by hand or electric mixer until well blended. Pour into 8 inch buttered dish and chill.