5 Minute S'mores Cereal Bars

5 Minute S'mores Cereal Bars ⅓ cup corn syrup 1 cup semi-sweet chocolate chips ½ tsp vanilla extract 4 cups graham cracker cereal 3 cups miniature marshmallows, divided Line an 8-inch or 9-inch baking pan with non-stick foil. Set aside. Combine 2 cups of marshmallows and cereal in a large, heat-safe bowl. Pour corn syrup into a microwave-safe bowl container. I used a glass Pyrex measuring cup. Microwave corn syrup for 1 minute on high heat. Stir in chocolate chips until melted. Quickly stir in vanilla extract. Pour chocolate mixture over the top of the cereal and marshmallows and stir until coated. Scoop contents into the prepared baking dish and press down with the bottom of a measuring cup or large spoon. Refrigerate for a few minutes until the chocolate has set up. Top with remaining cup of marshmallows and place under broiler for 1-2 minutes or until golden brown. Cut into squares and serve.