6 Tablespoons salted butter
16 oz bag mini marshmallows, divided
1 teaspoon pure vanilla extract
6 cups rice krispies cereal
Line a 9-inch square baking dish with parchment paper. Set aside.
In a large saucepan, melt butter over medium heat. Once melted, add in all but 1 cup of the marshmallows. Reduce heat to low and continue stirring until completely melted.
Remove from heat and stir in the vanilla. Add the cereal and the remaining 1 cup of marshmallows.
Pour into the prepared baking dish. Press GENTLY with your fingertips just until completely spread out (the harder you pack them in, the harder they are to eat).
Allow to set, about 1 hour. Cut and enjoy!