These moist muffins have cinnamon: - in the batter - in a crunchy brown sugar cinnamon topping - AND in a ribbon running through the center!
Sprinkle the remaining cinnamon sugar mixture over the top of the full muffin tins. Bake the muffins until a toothpick inserted comes out clean, and the tops are crackly.
- If desired, add an extra 1/2 teaspoon cinnamon to the cinnamon brown sugar topping. - For best results, measure the flour by weight, or the spoon and level technique.