How to Make It
Preheat oven to 350°F. Lightly coat a standard 12-cup muffin tin with nonstick spray or line with paper liners.
Whisk flour, baking powder, cinnamon, ginger, salt, and nutmeg in a medium bowl.
Whisk brown sugar, pumpkin, granulated sugar, vegetable oil and eggs in a separate medium bowl and beat vigorously until smooth and combined. Add flour mixture and mix until evenly incorporated.
Divide batter evenly among muffin cups. Sprinkle evenly with granulated sugar and bake until a toothpick inserted in the center comes out clean, 22 to 25 minutes. Serve warm or room temperature.