Banana Oat Muffins with Sour Cream

Ingredients (14)

• ✓ 1 cup rolled oats
• ✓ 1 cup all-purpose flour
• + ½ cup chopped walnuts add to pantry
• + 1 teaspoon baking soda add to pantry
• + 1 teaspoon baking powder add to pantry
• + ¼ teaspoon ground cinnamon add to pantry
• + ½ teaspoon salt add to pantry
• + ½ cup butter, softened add to pantry
• + 1 cup white sugar add to pantry
• ✓ 2 eggs
• + 1 cup mashed ripe banana add to pantry
• + 1 teaspoon vanilla extract add to pantry
• + ½ cup sour cream add to pantry
• + 4 tablespoons brown sugar add to pantry