1/2 cup butter or 1/2 cup light margarine  | 
                                                1/2 cup natural-style peanut butter  | 
                                                1 3/4 cups protein powder (chocolate or vanilla)  | 
                                                4 ounces light cream cheese  | 
                                                1 tablespoon vanilla (i use 2)  | 
                                                2 tablespoons splenda sugar substitute (16 packs of splenda)  | 
                                                1/2-3/4 cup chopped nuts (optional)  |