
Allow cookies to cool for 5 minutes, then transfer them to a cooling rack to cool completely. Scrape down the sides of the bowl and mix again. You can also use a handheld electric mixer. Cream together the butter and brown sugar in a stand mixer fitted with the paddle attachment. Bake the chilled cookie dough in the preheated oven for 12 to 14 minutes, until the edges begin to turn golden brown. Line a baking sheet with parchment paper or a nonstick baking mat. Chill in the refrigerator for 15 to 30 minutes.

Add the brown sugar and granulated sugar to the butter and mix until smooth.Once browned, remove the pan from the heat and immediately pour the butter into a large, heatproof bowl. After the butter melts it will start to foam, but continue whisking it for another 5 to 7 minutes, until the butter begins browning and there are lightly browned pieces on the bottom of the pan.

Melt the butter over medium heat, whisking constantly. Add the cut-up butter to a large, light-colored skillet or pot.Line baking sheets with parchment paper and set aside.
