To extend freshness, store muffins covered at room temperature for several days or refrigerate for up to one week.
For long-term storage, freeze for up to 3 months; thaw in the refrigerator overnight and reheat as desired.
Using a higher initial oven temperature ensures a tall muffin rise by setting the tops quickly.
Whole wheat flour may be substituted entirely or partially, maintaining the total amount at 1 and 1/2 cups. If using all whole wheat flour, include an additional tablespoon (15ml) of milk.
Frozen bananas can be used after thawing and draining excess liquid.
Sugar alternatives like honey or maple syrup may be substituted in equal measure, though results may vary slightly in texture and sweetness.