1 box confectioners' sugar
2/3 c. peanut butter
1 tbsp. vanilla
1/4 c. milk
1/4 stick butter
1/2 c. nuts (optional)

Mix sugar, peanut butter, vanilla and milk (mixture will be stiff). Make a well in center and put butter in well. Microwave on High for 4 minutes. Stir until smooth. Pour into buttered 1 quart dish. Refrigerate for 1 hour. Cut into squares and enjoy.