These yummy bars are some of my favorite treats. My mom used to make these for us when we were little and they are still just as delicious now as they were then. They make the perfect after-school snack because they are so quick and easy to prepare- even your kids can help because they don’t require an oven!
Measure the cereal into a large bowl. Grease a 13x9-inch pan with non-stick cooking spray. In another large microwavable bowl, microwave 5 cups marshmallows, the chocolate chips, corn syrup and butter uncovered on High for 2-3 minutes, stirring after every minute, until melted and smooth when stirred. Stir in vanilla.
Pour over cereal; quickly toss until completely coated. Stir in 1 cup marshmallows.
Press mixture evenly in pan, using back of spoon (or your hands- sometimes it's just easier that way). Let stand uncovered at least 1 hour, or refrigerate if you prefer a firmer bar. Store loosely covered at room temperature up to 2 days.