Chocolate Crisped Rice Treats (yields 24 squares)

3 Tbs. (43 g) butter	melt	stir until melted	stir until coated	stir in	press into 13x9-in. pan	cool	cut
10 oz. (280 g) marshmallows
6 cups (160 g) puffed rice
1/2 cup (85 g) chocolate chips