1Heat oven to 450°F. Spray cookie sheet with cooking spray.
2In medium bowl, stir Bisquick mix and red pepper. Cut in 1/3 cup butter, using pastry blender (or pulling 2 table knives through ingredients in opposite directions), until mixture looks like coarse crumbs. In small bowl, mix sweet potatoes and milk until blended; add to butter mixture, stirring with fork until dough leaves side of bowl.
3Place dough on well-floured surface; gently roll in flour to coat. Knead lightly 6 to 8 times. Roll or pat dough to 1-inch thickness. Cut with floured 2-inch biscuit cutter. Place about 1 inch apart on cookie sheet.
4Bake 12 to 15 minutes or until light golden brown. Brush with melted butter. Serve warm.