Let the muffins fully cool.
Add to a freezer bag. Press out as much air as you can, or seal almost all the way closed and suck out the air like a DIY vacuum sealer.
Seal.
Freeze for at least 4 hours and up to 6 months.
To thaw, transfer the bag or individual muffins to the fridge to thaw overnight or room temperature for about an hour.
Serve or warm in 15-second increments in the microwave.
You can also warm a muffin straight from the freezer. Place it onto a heat-safe plate and warm in 15-second increments until heated through.