Salted Brown Butter Rice Krispie Treats

A grown up version of a childhood classic.
From Smitten Kitchen.

Ingredients:
1 stick butter
10oz marshmallows
6c rice krispie cereal
heaping 1/4 tsp coarse salt

Melt butter in large, high sided pan over medium high heat, stirring constantly until it browns and smells nutty. Remove from heat and dump in marshmallows. Stir until smooth. There should be enough residual heat to melt all the marshmallows, but if not, you can put it back on the burner on low.

Add salt and cereal and stir well. Pour into a buttered 8x8 pan and push flat with buttered hands or a silicone spatula. Allow to cool and cut into squares.