brown sugar banana nut muffins

Name: brown sugar banana nut muffins
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: American
Ingredients: 1 large egg, whisked; 2 extra ripe bananas, mashed; 1/2 cup brown sugar; 1/4 cup whole milk; 1 tsp vanilla extract; 1/4 cup butter, melted; 3/4 cup all purpose flour; 2/3 cup rolled oats; 1/3 cup walnuts, finely diced; 1/4 tsp sea salt; 1 tsp cinnamon; 1/2 tsp baking soda; 3/4 tsp baking powder; 1/3 cup walnuts; 1 tbsp butter; 1 tbsp brown sugar; pinch sea salt