Chocolate Chip Banana Muffins

These chocolate chip banana muffins are based off my well-loved classic banana muffins. They are packed full of chocolate chips and can be made in minutes WITHOUT a mixer!
Ingredients

• 1 cup mashed, overripe bananas (typically 2 large bananas for me) (250g)
• ⅓ cup unsalted butter, melted and cooled until not warm to the touch (75g)
• ⅓ cup granulated sugar (66g)
• ⅓ cup light brown sugar, firmly packed (66g)
• 3 Tablespoons buttermilk
• 1 large egg, lightly beaten room temperature preferred
• 2 teaspoons vanilla extract
• 1 ⅓ cups all-purpose flour (167g)
• 1 teaspoon baking powder
• ½ teaspoon baking soda
• ½ teaspoon table salt
• 1 cup chocolate chips (plus additional for topping, if desired) (170g)
• Granulated sugar for topping, optional