Brown Butter Cookies with Reese's Pieces

Brown Butter Cookies with Reese's Pieces 4½ cups all-purpose flour 1 teaspoon baking powder 28 tablespoons butter unsalted 1 cup granulated white sugar 1½ cups packed light brown sugar 1 teaspoon salt 1 tablespoon vanilla extract 2 large eggs 2 large egg yolks 1 cup Reese's pieces 1 cup salted peanuts Optional: 2 tablespoons brown sugar Preheat oven to 375F degrees. Line two large baking sheets with parchment paper and set aside. In a medium bowl, whisk together flour, baking powder and salt. Set aside. Add 18 tablespoons of the butter to a medium skillet set over medium heat. Allow the butter to melt for 1 - 2 minutes. Swirl it around the pan, allowing it to brown, browning takes about 8-11 minutes, stir constantly. The butter will acquire a golden brown color and a nutty flavor. Remove the pan from the heat and transfer butter to a large, heat-safe mixing bowl. Add the remaining 10 tablespoons of butter to the melted butter, and stir gently until its all melted and combined. Add the sugars and vanilla extract to the butter and whisk until all combined. Add the eggs and egg yolks one at time, whisking after each addition. Allow the batter to rest for 3 minutes, then whisk for 30 seconds more. Repeat two more times, the end result should be a thick and shiny batter. Add the flour mixture and stir in just combined. Fold in Reese's pieces and salted peanuts. Form each cookie with 2 - 3 tablespoons of dough. Roll into a ball and flatten the cookie into a ½ inch disc. Place cookies 2 inches apart on the prepared baking sheets (optional: sprinkle cookies with brown sugar) and bake one tray at a time, 10 to 14 minutes, on the middle rack of your oven. Rotate baking sheet mid-baking and check the cookies after 8 minutes of baking, the edges should be golden brown. I baked my cookies for 11 minutes. Allow to cool on the pan for 1 to 2 minutes, then transfer to a wire rack to cool completely.