In a large mixing bowl, combine 1½ cups flour and the yeast. Set aside.
4 cups all purpose flour, 2 ¼ teaspoons active dry yeast
In a medium saucepan, heat the milk, potato flakes, butter, sugar and salt until it reaches 120°F.
1 ¾ cups milk, ½ cup instant mashed potato flakes, 6 tablespoons unsalted butter, ⅓ cup granulated sugar, 1 teaspoon kosher salt
Add the heated mixture to the flour and yeast mixture and beat on low speed for 30 seconds, scraping down the sides of the bowl as necessary. Add eggs and beat just until combined.
2 large eggs
Switch to the dough hook and add remaining flour, half a cup at a time, until fully incorporated. Continue mixing with the dough hook for another 3 to 5 minutes or until dough is smooth and elastic. (If you don't have a mixer, simply knead dough by hand for about 5 minutes on a lightly floured surface.)
4 cups all purpose flour
Divide the dough in half and place in two lightly greased bowls. Turn the dough over once to coat. Cover bowls and let rise until doubled in size - about an hour.