Big Batch Cinnamon Rolls
["1 (18 1/4 oz.) pkg. yellow or white cake mix without pudding", "2 pkg. RapidRise yeast", "6 1/4 to 6 1/2 c. all-purpose flour, divided", "1 tsp. salt", "2 1/2 c. warm water (120~ to 130~)", "3 eggs, beaten", "1/3 c. vegetable oil", "1/4 c. butter or margarine, softened", "1/2 c. sugar", "1 tsp. ground cinnamon", "2 c. sifted powdered sugar", "1/4 c. milk", "1 tsp. vanilla extract"]
["Combine cake mix, yeast, 1 cup flour and salt in a large bowl. Stir in water, eggs and oil.", "Beat at medium speed of an electric mixer 2 minutes.", "Gradually add enough remaining flour to make a soft dough.", "Turn dough out onto a well-floured surface; knead until smooth and elastic (about 5 minutes).", "Cover dough and let rest 10 minutes."]
["RapidRise yeast", "flour", "salt", "warm water", "eggs", "vegetable oil", "butter", "sugar", "ground cinnamon", "powdered sugar", "milk", "vanilla extract"]