Browned Butter Rice Krispy Treats

Notes

This recipe uses 1.5x the amount of butter and marshmallows for a more-gooey bar.

Lightly grease a 9×13-inch baking pan.
In a small saucepan, brown the butter over medium-high heat, cooking it just until it begins to turn an amber color. Remove from heat and transfer to a large, microwave-safe bowl.
Add the marshmallows to the browned butter and microwave on high for 60-90 seconds, until marshmallows have melted. Add the salt and stir the marshmallow mixture until smooth, then add in the cereal. Stir with a large spatula until everything is evenly combined. Fold in the mini-marshmallows.
Transfer mixture to prepared pan and press down into an even layer with a spatula. Allow bars to cool to room temperature before slicing.