Snack Mix Squares 2 1/2 cups halved pretzel sticks 2 cups Corn Chex® 1 1/2 cups M&M's® 1/2 cup butter or margarine 1/3 cup creamy peanut butter 5 cups miniature marshmallows In a large bowl, combine pretzels, cereal and M&M's®. In a large saucepan over low heat, melt butter and peanut butter. Add marshmallows; cook and stir until marshmallows are melted and mixture is smooth. Pour over pretzel mixture; stir to coat. Press into a greased 13 x 9-inch baking pan. Cool until firm; cut into squares. Yields about 3 dozen.