Cinnamon Brown Butter Breakfast Puffs

Ingredients

• 2/3 cup granulated sugar
• 1 tablespoon ground cinnamon
• 6 tablespoons unsalted butter
• 1 1/2 cups all-purpose flour
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon table salt
• 1/4 teaspoon freshly grated nutmeg
• 1/2 cup granulated sugar
• 1/3 cup (5 tablespoons plus 1 teaspoon) unsalted butter, at room temperature, plus extra for greasing muffin cups
• 1 large egg
• 1 teaspoon pure vanilla extract
• 1/2 cup buttermilk