Place eggs in the bowl of a stand mixer. Mix on low speed for 1 minute, add flour and sugars. Continue to mix until all ingredients are well blended and smooth. Add chocolate chips, ancho paste or chile powder and hot nuts right out of the oven. This will help to melt the chocolate. With the mixer running on low speed, slowly add the hot butter to the chocolate mixture. This will melt the chocolate completely. Once all the butter has been added continue to mix until completely blended.