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This is the recipe we come back to for lunchboxes, because it solves three problems at once: it uses the bananas that have gone too far, it freezes properly, and a muffin taken from the freezer at 7am is thawed and fine to eat by morning break.
One bowl, a fork, and no mixer. The oats give it enough structure that it doesn’t crumble in a bag.
Before you start
The bananas need to be properly over-ripe — heavily speckled or mostly black. Yellow bananas make a bland, dry muffin. If yours aren’t there yet, bake them in their skins at 180°C/350°F for about 15 minutes until black, then cool.
Don’t overmix. This is the only technique that matters here. Stop folding while a few streaks of flour are still visible. Mixing until smooth develops the gluten and gives you tough, tunnelled muffins.
Notes on the method
Rolled oats, not instant — instant oats turn to paste and the texture goes gluey. Whichever milk you use is fine; the recipe is not sensitive to it.
They are done when a skewer in the centre comes out with no wet batter and the tops spring back. A few moist crumbs are correct; wet batter is not.
Freezing and packing
Cool them completely before they go anywhere near a bag or a freezer — warm muffins in a sealed container steam themselves soft. Freeze in a single layer on a tray first, then transfer to a bag, and they won’t fuse into a block.
Frozen muffins keep their quality for about two to three months, in line with general freezer guidance for baked goods. Pack one straight from the freezer and it doubles as a small ice pack for the first hour or so — though it is not a substitute for a proper one. See keeping a packed lunch cold.
Substitutions we can and can’t vouch for
- Butter for the oil: works, melted and cooled slightly.
- Any milk: works, dairy or not.
- Blueberries or chocolate chips: fold in about 100g at the end.
- Nuts: check your school’s policy first — many are nut-free.
- Egg-free: we haven’t made this version without eggs, so we can’t tell you how it turns out. We’d rather say that than guess.
Where to go next
- 30 no-heat school lunch ideas
- The school lunch system
- Weekly meal prep — bake these while the oven is already on
