Preheat oven to 375°F. Spray two 24-count mini muffin tins with baking spray. (Makes about 48 mini muffins).
Whisk flour, granulated sugar, brown sugar, baking powder, salt, and pumpkin pie spice in a medium bowl.
1 ¾ cups (247g) all-purpose flour, ½ cup (100g) granulated sugar, ½ cup (100g) light brown sugar, 1 ½ teaspoons baking powder, ½ teaspoon salt, 1 Tablespoon pumpkin pie spice
Whisk eggs, pumpkin, and melted butter in another bowl.
2 large eggs, 1 cup pumpkin puree, ½ cup salted butter
Add dry ingredients to wet ingredients, stirring just until combined. The batter will be thick.
Scoop about 1 ½ Tablespoons of batter into each muffin cavity until they are about ¾ full.
Bake for 10-12 minutes until done. You can test with a toothpick inserted into the center of some of the muffins. It should come out clean with just a few crumbs. Or bounce your finger on the top of a muffin. If it leaves an indentation, they need to bake another minute or two longer.
Cool for 5 minutes before removing from the pan.
Gently toss the muffins in the additional melted butter and then roll in the cinnamon and sugar mixture to coat before serving. I like to add the cinnamon-sugar mixture to a large bag, add the muffins, then seal and gently shake to evenly coat everything.
½ cup (100g) granulated sugar, 2 teaspoons ground cinnamon, 4 Tablespoons salted butter