Beat butter and peanut butter at medium speed with an electric mixer until

blended. Add powdered sugar and vanilla wafer crumbs; beat until blended.

Press mixture evenly into a 13 x 9-inch baking pan sprayed with Pam.

Stir together chocolate chips and whipping cream in a medium saucepan over

low heat until melted and smooth. Spread evenly on top of peanut butter

mixture. Chill 1 hour or until firm.

Remove from refrigerator, and let stand at room temperature 10 minutes or

until slightly softened. Cut in 48 bars.