01 -
Set oven to 350°F and line a 12-cup muffin tin with paper liners or lightly grease with oil spray.
02 -
In a large mixing bowl, whisk together all-purpose flour, baking powder, baking soda, salt, and cinnamon until fully combined.
03 -
In a separate bowl, stir melted butter, granulated sugar, and brown sugar until smooth. Add eggs, whole milk, and vanilla extract. Mix until fully incorporated.
04 -
Pour wet ingredients into the dry ingredients and fold gently with a spatula until just combined. Avoid overmixing to maintain a tender crumb.
05 -
Divide batter evenly among muffin cups, filling each about three-quarters full.
06 -
Bake for 20 minutes or until tops are golden and a toothpick inserted in the center comes out clean.
07 -
While muffins bake, combine 1/2 cup granulated sugar and 1 teaspoon ground cinnamon in a small bowl and set aside.
08 -
Once muffins are slightly cooled but still warm, brush tops with melted butter and immediately dip each muffin in cinnamon sugar to coat thoroughly.
09 -
Serve muffins warm for best flavor and texture.