mix on low for 1 minute, then mix on medium speed for 2 minutes until the dough is evenly moistened. at this point, it will be very dry.
scrape the bowl and add the eggs and sugar, mixing on medium for approximately 3 minutes. reduce the speed to low and add the butter in 2-tablespoon chunks, mixing each addition until the butter is evenly distributed. once all the butter is added, increase the speed to medium-high and beat until the dough pulls away from the side of the bowl, approximately 10 minutes.
transfer the dough to another bowl, cover with plastic wrap and let rise at room temperature until doubled in size, 