Spray a 9-inch square baking dish lightly with non-stick cooking spray. Set aside. Take 1 cup of the mini marsh mallows and set aside.

In a large saucepan, melt butter over medium heat. Once melted, add in the remaining marshmallows. Reduce heat to low and continue stirring until completely melted.

Remove from heat and stir in the vanilla. Add the cereal and gently stir until combined. Then add in the 1 cup of mini marshmallows that you set aside and gently stir to combine.

Pour into the prepared baking dish. Press GENTLY just until completely spread out. I put a plastic baggie on my hand and spray it with a little non-stick spray to press it in the pan.

Allow to sit an 1 hour. You can refrigerate to get them to cool more quickly. Cut and enjoy! Makes 9 servings.