Mini Muffins
1 cup sugar
1/2 cup unsalted butter, room temperature
2 eggs
1 3/4 cups canned unsweetened pumpkin (one 15-oz. can)
1/4 cup buttermilk
3 cups all-purpose flour
1 tablespoon baking powder
1 teaspoon baking soda
1 teaspoon salt
1/4 teaspoon ground nutmeg
Topping
1 cup sugar
4 teaspoons ground cinnamon
1/2 cup butter , melted