Brown the butter by melting it in a saucepan over medium heat, stirring until it turns a rich golden brown, about 5-7 minutes.

Mix unsalted butter with granulated sugar and light brown sugar until smooth, about 2-3 minutes.

Add a room-temperature egg, whisking until fully incorporated.

Gently fold in baking powder and all-purpose flour until just combined.

Incorporate milk chocolate chips evenly into the dough.

Shape the dough into a rectangular block on floured parchment, about ½ inch thick, and slice into fries.

Chill in the freezer for 5-10 minutes, then transfer to a baking sheet and freeze for 30 minutes.

Preheat the oven to 375°F (190°C) and bake the fries for about 13 minutes.