PEEL bananas and cut them in half. Insert 1 wooden pop stick into each piece of banana. Freeze until firm (about 4 hours).
MELT chocolate, butter and peanut butter in microwaveable bowl on HIGH for 1 1/2 minutes; stir until melted.
PAINT frozen bananas with chocolate mixture using a pastry brush, then roll in chopped nuts, flaked coconut or candy sprinkles.