After a minute, turn the mixer back on to medium and add ¼ cup cubed butter, 1 to 2 pieces at a time, only adding more when the previous pieces are incorporated. Once all the butter has been added, increase mixer to medium-high and knead until the dough is glossy, smooth, and elastic when pulled, around 2 to 3 minutes. Cover the bowl with plastic wrap and let rise at room temperature until doubled in size, around 1 to 2 hours.