Preheat oven to 400°.
Combine biscuit and baking mix, 3 1/2 tablespoons cinnamon-sugar, and ginger in a large bowl; stir well, and make a well in center of mixture.
Combine milk and next 3 ingredients in a bowl; stir well.
Add to dry ingredients, stirring just until moist.
Divide batter evenly among muffin cups coated with cooking spray; sprinkle remaining 1 1/2 teaspoons cinnamon-sugar over batter.
Bake at 400° for 12 minutes.
Remove from pans immediately