Cinnamon Muffin in a Mug

Details

Ingredients

• 1 egg
• 2 tablespoons vanilla yogurt
• 2 tablespoons chopped walnuts
• 1 tablespoon all-purpose flour
• 1 tablespoon flax seed meal
• 1 tablespoon quick-cooking oats
• 1 tablespoon honey
• 2 teaspoons ground cinnamon
• ½ teaspoon baking powder