These rice crispy treats are made with browned butter and plenty of marshmallows. After 14 years of trial and error, I've developed a recipe that is simply perfect.
Line a 9x13 inch pan with parchment paper. Leave some overhanging on the sides for easier removal. Set aside.
In a large pot, melt the butter over medium-high heat. Cook until it foams and turns brown.
Decrease the heat to medium-low. Add the vanilla and 20 oz. of marshmallows. Stir until completely melted.
Remove the pot from the heat and add the cereal. Stir with a rubber spatula or wooden spoon until everything is evenly combined. Add the remaining 5 oz. of marshmallows and mix in (these will soften but not completely melt, you want gooey bits in the rice crispy treats).
Transfer the mixture to the prepared pan and press gently into an even layer.
Let the bars cool at room temperature for at least one hour. When you're ready to enjoy, lift the rice crispy treats out of the pan, slice and enjoy!