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Banana Oat Muffins for Lunchboxes

September 19, 2026 · By Kitchen With Mommy Editorial Team

Freshly baked homemade banana muffins in paper cases on a wooden table with bananas
By Kitchen With Mommy Editorial TeamUpdated 2 min readSchool Lunch, Snacks
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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

Banana Oat Muffins for Lunchboxes

A one-bowl banana muffin with rolled oats that freezes well and thaws in a lunchbox by mid-morning.

Prep15 minutes
Cook20 minutes
Total35 minutes
Serves12 muffins

Ingredients

  • 2 large very ripe bananas (about 200g peeled), mashed
  • 2 large eggs
  • 60ml (1/4 cup) neutral oil, or melted and cooled butter
  • 60ml (1/4 cup) milk
  • 75g (1/3 cup, packed) light brown sugar
  • 1 tsp vanilla extract
  • 120g (1 cup) plain or all-purpose flour
  • 90g (1 cup) rolled oats, not instant
  • 1 1/2 tsp baking powder
  • 1/2 tsp bicarbonate of soda (baking soda)
  • 1/2 tsp ground cinnamon
  • 1/4 tsp fine salt

Instructions

  1. Heat the oven to 180C / 350F / gas 4 and line a 12-hole muffin tin with paper cases.
  2. Mash the bananas in a large bowl with a fork until mostly smooth; a few lumps are fine.
  3. Whisk in the eggs, oil, milk, brown sugar and vanilla until combined.
  4. In a second bowl, stir together the flour, oats, baking powder, bicarbonate of soda, cinnamon and salt.
  5. Tip the dry ingredients into the wet and fold just until combined. Stop while a few streaks of flour are still visible - overmixing makes the muffins tough.
  6. Divide between the 12 cases, filling each about three-quarters full.
  7. Bake for 18-22 minutes, until the tops spring back and a skewer in the centre comes out with moist crumbs but no wet batter.
  8. Cool in the tin for 5 minutes, then lift onto a wire rack. Cool completely before packing or freezing.

Notes

  • Bananas must be heavily speckled or black. If yours are still yellow, bake them in their skins at 180C/350F for 15 minutes, then cool before using.
  • Freeze in a single layer on a tray first, then bag them, so they do not fuse together. Best quality within 2-3 months.
  • Fold in about 100g of blueberries or chocolate chips at the end of step 5 if you want them.
  • Check your school's allergy policy before adding any nuts.

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