Step 1

Coat an 8-ounce microwaveable mug with cooking spray.

Step 2

In a small bowl, combine applesauce, oil, milk, vanilla, flour, light brown sugar, 3/4 teaspoon cinnamon, the baking powder, and salt. Reserve 1 tablespoon batter in another small bowl and place remaining batter in mug.

Step 3

Add remaining cinnamon to 1 tablespoon batter, then swirl mixture into batter in mug.

Step 4

Microwave 60 to 70 seconds, or until center is set. Let cool 4 to 5 minutes, then remove to a plate.

Step 5

In a small bowl, combine icing ingredients, stirring until smooth. Spread on cinnamon roll and serve.