2 cups peanut butter chips
2 cups semi-sweet chocolate chips
2 (14 ounces each) cans sweetened condensed milk
3 tablespoons butter
Line a 13x9x2-inch pan with foil. Place chips in separate microwave bowls. Add 1 can of milk to each. Microwave each for 1 1/2-2 minutes. Stir until smooth; adding butter to peanut butter mixture. Pour peanut butter mixture into pan and top with chocolate mixture. Cool. Cover and chill until firm.