For a crunchy topping, sprinkle brown sugar over the tops of the muffins before baking.
Store in an airtight container at room temperature for up to 3 days or in the refrigerator for up to 1 week.
Freeze cooled muffins for up to 3 months. Thaw at room temperature or warm in the microwave before serving.
Ensure bananas are very ripe for the best flavor and natural sweetness.