In the bowl of a stand mixer with a dough hook on mixer, add warm milk, granulated sugar and yeast. Mix to combine and let rest for 5 minutes until yeast is active and mixture is bubbly.
1 cup whole milk, ½ cup granulated sugar, 2 ¼ teaspoons active dry yeast
Stir in mashed potatoes, melted butter, salt eggs and 2 cups of flour.
½ cup mashed potatoes, ¼ cup butter, ½ teaspoon salt, 2 eggs, 4 ½ cups flour
Add remaining flour ½ cup at a time. Continue adding and mixing flour until dough forms in to a ball and dough is soft and just slightly sticky. You may not use all the flour.
4 ½ cups flour
Knead for 10 minutes.
Remove dough from mixing bowl and place in a large greased bowl. Cover with plastic wrap and let sit until dough doubles in size (1 ½- 2 hours)
Gently deflate dough and divide dough in half.
Roll one half of dough into an 8 x 12" rectangle. Cut into 6 x 2" pieces using a pizza cutter or a large sharp knife.
Place each rectangle on a baking sheet lined with parchment paper. Leave space between each piece so they have room to rise.
Cover with a clean kitchen towel and let rise for 30 - 45 minutes.