Cinnamon Sugar Swirl Cupcakes - Cupcake Fanatic

Ingredients

• 1 2/3 cups all purpose flour
• 1 cup sugar
• 1 1/2 tsp cinnamon
• 1/4 tsp baking soda
• 1 tsp baking powder
• 3/4 cup butter, room temperature
• 3 egg whites
• 2 tsp vanilla extract
• 1/2 cup sour cream
• 1/2 cup milk
• 1 and 1/2 tbsp ground cinnamon
• 1/4 cup sugar
• 1/2 cup butter
• 1/2 cup shortening
• 4 cups powdered sugar
• 2 1/2 tsp cinnamon
• 3/4 tsp vanilla extract
• 1-2 tbsp water or milk