Preheat oven to 400 ℉. Line muffin pan with liners. Set aside.
In large bowl add eggs, milk, yogurt, vanilla, brown sugar, and butter. Whisk together until completely incorporated.
2 large eggs, 1 cup milk, 1/2 cup non-fat plain Greek yogurt, 1 teaspoon pure vanilla extract, 1/2 cup brown sugar, 1 stick unsalted butter
Add in flour, oats, baking soda and cinnamon. Stir in apples until combined.
2 cups all-purpose flour, 1/2 cup old fashioned oats, 2 teaspoons baking soda, 2 teaspoons ground cinnamon, 1 1/2 cups apples
Scoop into muffin liners. Set aside.
In small bowl add butter, flour, brown sugar, oats and cinnamon. Stir together.
4 tablespoons unsalted butter, 3 tablespoons all-purpose flour, 2 tablespoons brown sugar, 1 tablespoon old fashioned oats, 1/2 teaspoon ground cinnamon
Sprinkle the top of each muffin with a little of the topping mixture.
Bake for 12 minutes. Cool.
FOR THE DRIZZLE: Whisk together powdered sugar and milk.
1/2 cup powdered sugar, 1 tablespoon milk
Drizzle over muffins
Serve and ENJOY!