Muffin Roti Pisang dalam Mug

Bahan-bahan (1 porsi)

• 1/2 very ripe banana
• 1/4 teaspoon ekstrak vanila
• 2 tablespoons all-purpose flour (or gluten-free flour mix)
• 1 teaspoon sugar (optional but not needed)
• 1/4 teaspoon baking powder
• Pinch of salt
• 1 tsp oil of your choice (optional but not needed)
• mini chocolate chips, sprinkles, chopped walnuts, chopped pecans, hemp seeds, etc ((extra points))