Be shure to first remove any unpopped kernels from the popcorn! We dont want any broken teeth

In microwave or double boiler, melt chocolate, peanut butter, and butter until melted. Stir in vanilla. Place the popped popcorn* in a large bowl and pour the chocolate mixture over all. Stir until evenly coated. Add yhe powdered sugar and stir until each piece is covered. Spread out on cookie sheets to set the chocolate. Try not to eat the whole batch immediately. If you have any leftover, store in an air tight container.