Celebrate National Walnut Day on May 17 with these easy Banana Walnut Muffins, courtesy of Allrecipes.
This recipe makes 12 delicious muffins.
Preheat your oven to 350 degrees Fahrenheit and grease a muffin tin.
In a small bowl, whisk together 1 1/2 cups all-purpose flour, 1 teaspoon baking powder, 1 teaspoon baking soda, 1 teaspoon cinnamon, 1/...