Ingredients
1 package (1/4 ounce) active dry yeast1/3 cup warm water (110° to 115°)1/2 cup sugar, divided1 cup whole milk1/2 cup butter, cubed1 tablespoon salt1 cup mashed potatoes2 large eggs, room temperature, beaten5 to 6 cups all-purpose flourCINNAMON FILLING:1/4 cup butter, melted3/4 cup sugar1 tablespoon ground cinnamon
Preparation
In a large bowl, combine yeast, warm water and 1 teaspoon sugar. In a saucepan, heat milk, butter, salt and remaining sugar until butter is melted. Remove from heat; stir in potatoes until smooth. Cool to lukewarm; add eggs and mix well.
Beat potato mixture and 5 cups flour into yeast mixture until smooth. Stir in enough remaining flour to make a soft dough. Turn onto a floured surface; knead until smooth and elastic, 6-8 minutes. Place in a greased bowl, turning once to grease the top. Cover and let rise in a warm place until doubled, about 1-1/2 hours.
Punch down dough and divide in half. On a lightly floured surface, roll each half into a 16x8-in. rectangle. Brush with melted butter. Combine sugar and cinnamon; sprinkle over butter. Roll up jelly-roll style, starting with a short side; pinch seam to seal. Place in 2 greased 8x4-in. loaf pans. Cover and let rise in a warm place until doubled, about 45 minutes. Preheat oven to 375°. Bake loaves until golden brown, about 20 minutes. Cover loosely with foil if tops brown too quickly. Remove from pans to wire racks; serve warm.
