1. Grease 12 muffin cups. Preheat oven to 425 degrees F. Mix together sugar and cinnamon in small bowl.
2. Blend Bisquick and milk. Beat 15 strokes with a fork. Roll dough onto a floured surface. Knead gently 8-10 times. Roll into a 12"x7" rectangle. Spread with melted butter. Sprinkle with sugar-cinnamon mixture. Roll up tightly width-wise. Seal well. Cut into 1" slices. It is helpful to use a piece of thread (pulled through) to slice it. Set each slice in muffin cup.
3. Bake for 12-15 minutes or until lightly browned.