Add 1/2 cup of butter to a saucepan and brown it. Once it is browned, add it to a heat proof bowl, and add the other 1/2 cup of butter to it. Browning only half of the butter like this allows for more moisture to be retained, and it still brings all of the flavor. Add 1 tablespoon fo water to the butter, and allow the entire mixture to cool to room temperature, or until the butter is solidified, but still very soft.
While the butter is cooling down preheat the oven to 350°F, and add the flour, salt, baking powder, and baking soda into a medium-sized bowl. Whisk to combine. Set aside.
Using a stand mixer with the paddle attachment, or a hand mixer, beat the soft, solidified, brown butter until the added water combines into the butter, and it is light in color.
Add the granulated sugar, brown sugar, and powdered brittle. Mix on high for 2-3 minutes or until the butter mixture is light and fluffy and the sugars have fully creamed into the butter.
Add the eggs, one at a time, mixing until fully incorporated before adding the next. After the eggs have been added, mix in the vanilla.
Add the flour mixture, and mix on low speed to incorporate it until just a bit of flour is left un-mixed. At this point, add in the brittle pieces and your chopped chocolate. Mix to evenly distribute the add-ins throughout the dough, and to incorporate that last bit of flour.
Scoop into tablespoon sized dough pieces and bake in preheated oven for 10-15 minutes. For best results, refrigerate the scooped dough balls for 24 hours to allow all of the flavors to truly combine. Enjoy!