Whole Wheat Banana Muffins

Ingredients (12)

• 2 cups white whole-wheat flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1/4 teaspoon ground cinnamon
• 4 large ripe bananas
• 3/4 cup packed brown sugar
• 1/4 cup coconut oil
• 1 large egg
• 1/2 cup plain Greek yogurt
• 2 teaspoons pure vanilla extract
• Turbinado sugar