Preheat oven to 350℉ and grease a muffin tin with nonstick cooking spray. Set aside.
In a small bowl, combine 2 teaspoons cinnamon with 2 tablespoons white sugar. Mix well and set aside.
2 tsp cinnamon, 2 tbsp sugar
Add flour, baking soda and salt in a small bowl and mix well.
1 cup flour, ½ tsp baking soda, ¼ tsp salt
In a larger mixing bowl, add 3/4 cup white sugar, milk, egg and oil. Mix well. Stir in flour mixture. Use a 2 tablespoon portion scoop to scoop 2 tablespoons of batter into 6 muffin tins. Sprinkle with 1/2 teaspoon cinnamon sugar mixture. Top with an additional 2 tablespoons batter and 1/2 teaspoon cinnamon sugar mixture.
¾ cup sugar, ½ cup milk, 1 egg, 2 tbsp oil
Bake for 15-18 minutes or until a toothpick inserted in the center of the muffin comes out clean. Cool completely and remove from pan (slide a knife around the edge of the muffin and pop it out). Shake excess sugar off of the top of the muffin.
In a small bowl combine powdered sugar and half and half. Mix well. Place into the corner of a sealable sandwich bag and snip a small hole in the corner tip. Swirl on each of the muffins.