01 -
Preheat oven to 350°F and line a 12-cup muffin tin with liners or spray with nonstick spray.
02 -
In a bowl, whisk together pumpkin puree, melted butter, sugar, egg, and vanilla until smooth.
03 -
In another bowl, whisk flour, baking soda, baking powder, salt, and cinnamon.
04 -
Gently fold dry ingredients into wet until just combined—don’t overmix.
05 -
In a small bowl, stir together melted butter, brown sugar, and cinnamon for the swirl.
06 -
Fill muffin cups halfway with batter. Top each with a spoonful of cinnamon swirl, then add more batter. Swirl lightly with a toothpick.
07 -
Bake for 20–25 minutes, or until a toothpick inserted comes out clean and tops are golden.
08 -
While muffins cool, whisk glaze ingredients until smooth. Drizzle over slightly cooled muffins.