Warm milk to 40 degrees. Stir 1 tablespoon of sugar, milk and 1 packet of active dry yeast. Give it a quick stir and let stand for 5 minutes until foamy.
In the bowl of a stand mixer, fitted with the hook attachment, combine flour, salt, sugar, and yeast mixture. Beat on low until just combined.
Add one egg at a time, and continue kneading until the dough begins to form.
Add butter, one tablespoon at a time, and knead at medium speed until the dough is soft and smooth, and doesn’t stick to the sides of the bowl. This takes about 8 minutes. If the dough is too sticky, add more flour, 1 tablespoon at a time.
Spray a large bowl with cooking spray and transfer the dough. Cover with plastic wrap and allow to rise for about an hour, at room temp.