In a heavy medium saucepan, combine the chocolate-flavored candy coating and the butterscotch-flavored pieces. Cook and stir over low heat till melted, or combine pieces in a microwave-safe 4-cup glass measuring cup. Microwave on 100% power (high) for 2 to 3 minutes or till melted, stirring every minute.
Stir peanut butter into chocolate mixture. Spread 1 3/4 cups of the mixture into a greased 15 x 10 x 1 inch baking pan. Refrigerate till mixture in pan is set (about 20 minutes). Set aside remaining mixture.
Meanwhile, in a large saucepan, melt butter or margarine. Stir in evap. milk & pudding mix. Cook & stir over med. heat till thickened (mixture may appear curdled). Stir in maple flavoring & vanilla. Stir in powdered sugar.
Spread over cooled chocolate mixture in pan. If necessary, re-heat remaining chocolate-peanut butter mixture to melt. Stir in peanuts. Spread over pudding. Chill to set.
Cut candy into squares. Makes about 6 lb. of candy.