01 -
Set oven to 350°F (175°C). Line a standard muffin tin with paper liners or lightly grease with oil.
02 -
In a large mixing bowl, whisk together flour, baking powder, baking soda, salt, and cinnamon until evenly combined.
03 -
In a separate bowl, combine melted butter, granulated sugar, and brown sugar, stirring until smooth. Add eggs, milk, and vanilla extract, mixing thoroughly.
04 -
Slowly fold wet ingredients into dry ingredients using a spatula. Stir until just incorporated, avoiding overmixing.
05 -
Divide batter evenly among muffin cups, filling each about three-quarters full.
06 -
Bake on the center rack for 18 to 22 minutes, or until a toothpick inserted into a muffin comes out clean.
07 -
While muffins are baking, mix 1/2 cup granulated sugar with 1 tablespoon ground cinnamon in a shallow bowl and set aside.
08 -
Cool muffins in the pan for five minutes. Brush tops generously with melted butter, then immediately dip each in cinnamon sugar mixture to evenly coat.
09 -
Enjoy muffins warm for best texture and flavor, accompanied by coffee or juice.