Double Chocolate Muffins

Bahan-bahan (12 porsi)

• 2 large eggs, at room temperature
• 1/2 cup maple syrup
• 1/2 cup milk
• 2 teaspoons vanilla extract
• 1 1/2 cups whole wheat flour ((or all purpose))
• 1/2 cup unsweetened cocoa powder
• 1 teaspoon instant coffee powder ((optional))
• 1 1/2 teaspoons baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1/3 cup mini chocolate chips ((optional))
• 4 tablespoons salted butter, melted
• 1/2 cup chopped dark chocolate or chocolate chips
• 1/3 whole milk