This recipe makes twelve average sized muffins. You can halve the ingredients to make a smaller batch, however, this may be a bit awkward as the full recipe for 12 calls for 1 banana. Halving this will leave you with half of an overripe banana to use up! Rather than making a smaller batch, I would probably recommend freezing extra muffins. This is a super easy one bowl banana pumpkin muffin recipe, which freezes great - perfect for make ahead quick breakfasts or snacks later!