Preheat your oven to 350F
In a large mixing bowl, whisk together browned butter, brown sugar, cane sugar, vanilla, and pumpkin spice
Whisk in canned pumpkin puree and egg
Mix in flour, flaky salt, and baking powder until a dough forms
Fold in milk chocolate chips and mini marshmallows
Transfer to a lined 9x9 baking dish and bake for 30-35 minutes
Let them set for about 10 minutes before removing and slicing into bars
