In a small bowl add the milk, yeast, sugar, and egg. Stir and set aside to foam for 5 mins.
¾ cups milk, 1 large egg, 2 tablespoon sugar, 1¼ teaspoon instant dry yeast
Using a large mixing bowl combine the flour and salt. Add the yeast mixture to the flour mixture and combine until flour is incorporated, scraping the sides of the bowl. 3 cups bread flour, 1¼ teaspoon salt
Once all the flour is incorporated, knead the dough for 8 to 10 minutes on medium speed until smooth, or by hand for 10 minutes. The dough will be soft and sticky.
Add the softened, room-temperature butter a little at a time. Knead by hand or with a dough hook until smooth and elastic, about 8 to 10 minutes.
3 tablespoon butter
Remove the dough from the bowl and shape into a ball. Transfer to an oiled bowl and cover with a cloth or plastic wrap. Set in a warm location to proof and double in size, about an hour.
When the dough is doubled in volume turnout the risen dough onto a lightly floured surface. Using a rolling pin, roll out like into a 9 inch wide rectangle, about ¾ inch thick. Gently fold or roll the dough into a 9 inch wide log.
Spray the Pullman baking pan and lid with non-stick cooking spray. Transfer the dough log to the loaf pan and cover with plastic wrap or a cloth. Set in a warm location for about 45 minutes, or until the dough is about 2 inches from the pan rim.
While the bread is proofing, preheat your oven to 375℉. Place the loaf pans on a baking sheet in the center of the oven. Bake for 20 to 25 minutes.
Remove from the oven and let sit for 5 minutes, then gently slide the lid off the pan and allow to cool for another 30 minutes before tipping out to cool on a cooling rack.