Melt butter in large non-stick skillet over medium heat. Add cornflakes and sugar; cook, stirring constantly, for 3 to 5 minutes or until golden and crisp. Cool completely.
Press half of cornflake mixture into a greased 9-inch (2.5 L) square baking pan. Fold together ice cream, whipped topping, cinnamon and 3 packages ROLO® Peanut Butter in large bowl; spread in an even layer over crust. Sprinkle remaining cornflake mixture over ice cream layer.
Drizzle with chocolate sauce and caramel sauce. Scatter remaining package of ROLO® Peanut Butter overtop.
Freeze for 4 hours or until firm. (Make ahead: Freeze up to 3 days.) Let stand at room temperature for 15 to 30 minutes before serving.