Mini Keto Banana Nut Muffins (Made With Real Banana)

Walnut-topped mini muffins piled on a white plate, with more muffins and a bowl of raspberries behind
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Introduction

Plenty of keto banana recipes skip the fruit and lean on banana extract instead, and that’s a fair call — bananas bring carbohydrate with them, and the extract is how you keep a low-carb bake low-carb. Our own keto zucchini banana bread does exactly that.

If you really love banana, though, it can be a bit of a letdown. There are some very good extracts out there, and even so they don’t always bring quite the same smell and taste the fruit does.

These little muffins split the difference. Half a ripe banana goes into the batter, mashed, with the extract behind it rather than doing all the work on its own.

Why Only Half a Banana

Because a whole one is sneakier than it looks. A medium banana carries close to 24 grams of net carbohydrate, going by USDA FoodData Central — a lot to spend on one piece of fruit when you’re watching carbs.

That’s also why these are mini muffins. The ingredient list stays close to what you’d expect from a banana nut muffin, and the carbs get moderated instead; the size of the bake is part of that. Half a banana across fourteen small muffins might look stingy for a recipe with banana in the name, but it’s the thing that makes it workable on this diet at all.

So there’s real fruit in the batter, the extract carries the flavor the rest of the way, and each muffin stays little. You’ll find the full per-serving breakdown — calories, fat, fiber, protein, and net carbs — in the Nutrition Facts panel with the recipe below.

It’s a One-Bowl Batter

This is the part that makes them a weekday thing rather than a project. Almond flour, mashed banana, both extracts, baking powder, eggs, cinnamon, nutmeg and Swerve all go into one bowl and get beaten until there are no dry pockets left. No creaming, no separate wet and dry bowls, nothing to fold in gently.

Glass bowls of almond flour, mashed banana, chopped walnuts and powdered sweetener around two whole eggs, with smaller bowls of cinnamon, nutmeg and vanilla

The walnuts are the only thing you hold back. They go over the filled wells right before the pan goes in, so they end up sitting on top of each muffin instead of disappearing into it.

Two things before you start. There’s no butter and no oil anywhere in the ingredient list, so grease the mini muffin pan properly before you spoon the batter in. And start checking at ten minutes — the range is ten to fifteen, and muffins this small cover a lot of ground in those last few minutes. Golden edges and a clean toothpick mean they’re done. Give the pan a few minutes after that before you lift them out; they’re tender while they’re hot and they firm up as they cool.

Mini Keto Banana Nut Muffins

Prep Time
10 minutes
Cook Time
15 minutes
Total Time
25 minutes
Yield
14 muffins
Course
Breakfast
Cuisine
American

Ingredients

All Ingredients

Nutrition Facts

14 servings per recipe
Trans Fat 0g 0% 0g 0%
Allulose 0g 0% 0g 0%

About these numbers: We are home cooks, not certified nutritionists. Nutrition is shared as a courtesy and calculated with free online nutrition calculators — we compare a few to get as close as we can — so please treat it as a helpful estimate rather than a guarantee. The brands you buy, any swaps you make, and how generously you portion the recipe will all move these numbers.

Directions

  1. Preheat the oven and prepare the pan.

    Preheat the oven to 350 degrees Fahrenheit (175 degrees Celsius).

    Grease a mini muffin pan well so the small muffins release cleanly after baking.

  2. Mix the batter.

    Add the almond flour, mashed banana, banana extract, vanilla, baking powder, eggs, cinnamon, nutmeg, and Swerve to a mixing bowl.

    Beat until the batter is well combined and no dry pockets remain.

  3. Fill the mini muffin pan and add the walnuts.

    Divide the batter among 14 mini muffin wells.

    Sprinkle the chopped walnuts over the tops before baking.

  4. Bake, then let them settle in the pan.

    Bake for 10–15 minutes. They are ready when the tops have domed and gone golden around the edges, the walnuts have toasted, and a toothpick pushed into the middle of one comes out clean.

    Leave the pan alone for a few minutes before you lift them out. Almond flour muffins are tender while they are hot and firm up as they cool, so waiting is what gets them out of the wells in one piece.

Notes

Ingredient Notes

  • The banana. Half of one medium ripe banana, mashed before it goes in. It’s a real ingredient here rather than a garnish, and it’s half a banana for the whole batch of fourteen — not half per muffin.
  • Banana extract alongside it. The extract carries the banana flavor further than half a banana can on its own, which is what keeps the fruit down to half.
  • Almond flour only. There’s no tested coconut-flour version of this batter, and the two don’t swap one for one — treat that as an untested change rather than a substitution.
  • Swerve Confectioners. If you bake with a different sweetener, follow that product’s own conversion guidance — powdered blends don’t all measure the same way.

Before You Bake

  • Grease the pan well. There’s no butter or oil in the batter, and these are small wells to get fourteen muffins out of.
  • Start checking at ten minutes. Ten to fifteen is the range. Small muffins change quickly at the end, so check rather than wait for the clock.

Serving

Good on their own for breakfast or as a snack, and they go well with coffee or tea.

Frequently Asked Questions

Do these keto banana nut muffins use real banana?

Yes — half of one medium ripe banana, mashed into the batter. That’s half a banana for the whole batch of fourteen mini muffins, not half a banana each. Banana extract goes in alongside it, so the fruit isn’t doing all the flavor work on its own.

Can I make full-size muffins instead?

The verified bake time here is for a mini muffin pan, so we don’t have a reliable full-size time to give you. Ten to fifteen minutes is the mini range; a standard pan would need longer, and we’d rather not guess at how much. If you try it, tell us in the comments how it went.

Can I use coconut flour instead of almond flour?

Not as a straight swap. Coconut flour absorbs far more liquid than almond flour, so the two don’t measure one for one, and this recipe doesn’t have a tested coconut-flour version. Almond flour is what it’s built around.

Can I leave out the walnuts?

Yes. They go on top of the filled wells rather than into the batter, so leaving them off changes nothing else about the recipe. Don’t read that as making these nut-free, though — the batter is a cup of almond flour, so they aren’t muffins for someone with a nut allergy either way.

Wrap-Up

If what you’ve been missing is actual banana in your low-carb banana baking, this is the one to try. Half a ripe banana, a little extract behind it, and fourteen small muffins with walnuts on top.

Have you tried this recipe or any other recipe on the blog? Please rate it below and let us know what you think in the comments! We love hearing from you!

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Enjoy!