Step 1

Line a 9-inch square baking dish with parchment paper. Set aside.

Step 2

In a large saucepan, melt butter over medium heat. Add in all but one cup of the mini marshmallows. Reduce heat to low and stir continuously until marshmallows are completely melted.

Step 3

Remove from heat. Stir in vanilla extract. Add in the cereal and the remaining 1 cup of mini marshmallows, folding gently.

Step 4

Pour into prepared baking dish. Use your fingers (dipped in water) to gently press the treats into the pan. Allow to set one hour.