Mix above ingredients thoroughly. Pour into greased and floured jelly roll pan. Bake at 350 degrees for 20-25 minutes. Immediately spread 1-1 1/2 cups creamy peanut butter over warm cake. Put in refrigerator (or freezer) until peanut butter is firm.
Melt 8 ounces (or more) of milk chocolate candy bars (or Hershey Kisses) in double boiler. Pour and spread evenly over cake. Put in refrigerator (or freezer) until firm.