A cook from one of our local schools scaled down this recipe for me several years ago. Every year for my youngest son's birthday, he requests Peanut Butter Squares instead of the usual birthday cake.
PEANUT BUTTER SQUARES
16 oz peanut butter
1/4 cup honey
1/2 cup powdered milk
1/2 cup powdered sugar
Line a 9" square cake pan with foil, over lapping sides. Spray bottom of foiled pan with cooking spray. Set pan aside.
Mix peanut butter, honey, powdered milk and powdered sugar together until well blended. Pour into cake pan and flatten until evenly spread in pan. Refrigerate at least 2 hours, preferably overnight.
Remove peanut butter mixture from pan by lifting by the foil ends. Sprinkle top with additional powdered sugar. Cut into squares. Store in refrigerator with wax paper between layers.