Healthy Banana Muffins

Ingredients (12)

• 3 large overripe bananas
• 1 large egg
• 1/3 cup nonfat plain Greek yogurt
• 2 tablespoons canola oil
• 1/3 cup light brown sugar
• 1/4 cup maple syrup
• 1 teaspoon pure vanilla extract
• 1 teaspoon baking soda
• 1/4 teaspoon kosher salt
• 1 teaspoon ground cinnamon
• 1 1/2 cups white whole wheat flour
• 1 cup walnut halves