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["In very large mixing bowl combine 3 1/2 cups of the flour and yeast.", "In medium pan, heat milk, butter, sugar and salt just till warm (120-130 degrees) and butter is almost melted, stirring constantly. Add to flour mixture.", "Add eggs and vanilla, beating with a mixer on low for 30 seconds, scraping sides of bowl constantly. Beat on high for 3 minutes.", "Using a wooden spoon, stir in as much of the remaining flour as you can.", "Turn dough out onto a lightly floured surface. Knead in enough of the remaining flour to make a moderatly soft dough that is smooth and elastic (3-5 mins total).", "Shape into a ball. Place in greased bowl, turning once.", "Cover; let rise an a warm place until double. approximately 1 hour.", "For filling, combine brown sugar and cinnamon.", "Grease two 13x9x2 inch baking pans; set aside.", "Punch dough down and turn onto a lightly floured surface. Divide dough in 1/2. Cover and let rest 10 minutes. Roll 1/2 the dough to a 16x12"" rectangle.", "Spread dough with half of the softened butter. Sprinkle with half the brown sugar and 1 T cinnamon.", "Roll up jelly roll style starting with one of the short sides; pinch edges to seal.", "Slice roll into 6 pieces.", "Arrange dough pieces cut side up, in one of the prepared baking pans. Repeat with remaining dough, butter and filling.", "Cover and let dough rise in a warm place until nearly double (about 45 mins.).", "Preheat oven to 350.", "Bake for 35-40 minutes or until browned and rolls sound hollow when lightly tapped.", "Remove from oven, cool for 1 minute then invert onto wire rack. Invert again onto serving platter and spread with butter cream icing.", "Butter Cream Icing:.", "In large bowl, beat together softened butter, 3 cups powdered sugar, vanilla and salt. Gradually beat in evaporated milk.", "Beat in enough additional powdered sugar (about 1 1/2 cups) to make a soft spreading consistency."]