Chocolate Chip Pumpkin Muffins

Bahan-bahan (12 porsi)

• 3/4 cup unsalted butter cut into pieces
• 1 1/4 cups all-purpose flour
• 1/2 cup granulated sugar
• 1/4 cup brown sugar
• 3/4 teaspoons baking soda
• 3/4 teaspoons baking powder
• 1/2 teaspoon salt
• 2 teaspoons pumpkin spice
• 1/2 teaspoon ground cinnamon
• 2 large eggs lightly beaten (room temperature preferred)
• 1 1/2 teaspoon vanilla extract
• 1 cup pumpkin puree
• 2 Tablespoons milk
• 1 ⅓ cup semisweet chocolate chips (divided.)
• coarse sugar for sprinkling (optional)