16 ounces white chocolate, chopped
3/4 cup crunchy peanut butter
1 cup milk chocolate chips

Butter a 15 x 10-inch pan; set aside.

Place white chocolate in a medium-size microwave-safe bowl. Microwave on HIGH until melted, stirring frequently. Stir in peanut butter. Spread into prepared pan. Drizzle with melted milk chocolate chips, stirring through mixture to create a marbled effect. Let stand until set. Break into bite-size pieces.