Ingredients
2 packages (1/4 ounce each) active dry yeast1/2 cup warm water (110° to 115°)2 cups warm whole milk (110° to 115°)1/2 cup sugar1/2 cup butter, softened, divided1 teaspoon salt5-3/4 to 6-1/4 cups all-purpose flour2/3 cup packed brown sugar1 teaspoon ground cinnamonTOPPING:2 cups packed brown sugar1/4 cup cornstarch1 cup sour cream3 teaspoons vanilla extract
Preparation
In a large bowl, dissolve yeast in warm water. Add the milk, sugar, 1/4 cup butter, salt and 4 cups flour; beat until smooth. Stir in enough remaining flour to form a soft dough.
Turn onto a floured surface; knead until smooth and elastic, about 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 hour.
Punch dough down. Turn onto a lightly floured surface; divide in half. Roll each portion into a 12-in. x 10-in. rectangle; spread with remaining butter. Combine brown sugar and cinnamon; sprinkle over dough to within 1/2 in. of edges. Roll up jelly-roll style, starting with a long side; pinch seams to seal.
Cut each roll into 12 slices. Place cut side down in two greased 13-in. x 9-in. baking pans. Cover and let rise until doubled, about 30 minutes.
In a small bowl, combine brown sugar and cornstarch; stir in sour cream and vanilla. Spoon over rolls.
Bake at 400° for 20-25 minutes or until golden brown. Immediately invert onto serving platters. Serve warm.