Banana Bread With a Sourdough Twist—Just Like I Make When Chilly Weather Hits

Honestly, I never meant to become that person with a bowl of spotty bananas and a jar of sourdough starter eyeing me from the back of the fridge. But, here we are. Every time it’s rainy or I’m a bit restless, out comes this recipe—my go-to Sourdough Banana Bread. Years ago, I made a loaf for a sleep-deprived friend (we all were, her baby had colic—yikes). She called me at 8am demanding the recipe because apparently her toddler polished off half the loaf for breakfast. I mean, who doesn’t want to be that kind of hero, even if only in carbs?

Why on Earth Would I Make Sourdough Banana Bread?

I make this when the bananas are a bit too far gone for polite company (you know the ones), or when I need to use up a sourdough starter that’s looking a bit sluggish. My family goes absolutely nuts for this—my partner claims it’s better than anything at the local café (not that I’m keeping score, but...I totally am). Also, it’s just nice to add sourdough starter to something besides pancakes now and then, and I love the subtle tang. Plus, the loaf stays moist for a couple days, which is a real win if you aren’t plowing through it in one go. (Sometimes, honestly, it’s even better on day two; go figure.)

What You’ll Need—And What You Can Fudge

3 medium, super ripe bananas (those brown, mushy ones—fresher bananas just aren’t the same)
120g (about ½ cup) sourdough starter, discard or fed (I use discard most of the time; if you’re desperate, honestly a little yogurt works as a sub, though you’ll miss the tang)
2 large eggs (no eggs? I’ve tried a flax egg in a pinch. It worked, sorta.)
100g (about ½ cup) sugar (sometimes I throw in part brown sugar if I’m feeling wild, but granulated is just fine)
90g (a generous 6 tbsp) melted butter (or even a mild olive oil—my grandmother always insisted on butter, but I think she just liked the smell)
200g (1 ½ cups) all-purpose flour (whole wheat works, though the bread’s a bit heavier… not bad, just a touch "more earnest")
1 teaspoon baking soda (don’t swap this for baking powder—it’s not the same animal, trust me)
½ teaspoon salt
1 teaspoon vanilla extract (I usually eyeball it, honestly, but that’s the idea)
Optional: 80g (a handful) chopped walnuts or pecans (leave them out if you don’t do nuts—my oldest pretends she’s allergic, though she isn’t)
Optional: a handful of chocolate chips (because, why not?)

How I Pull This Together—Step by Step, Sort Of

Preheat your oven to 175°C (or about 350°F); grease a loaf pan (hey, if you don’t have baking spray, just rub some butter around, it’ll do in a pinch).
Peel and mash your bananas in a big bowl. Get ’em as smooth or chunky as you like. I once left mine almost whole—wouldn’t recommend but it was... interesting?
Pour in the melted butter, sugar, and eggs. Give it all a good stir. Then add the sourdough starter (don’t worry if it looks a bit odd here—it always sorts itself out).
Stir in the vanilla. Take a breath—this is usually where my kids start circling like little sharks.
In a second smaller bowl, whisk together the flour, baking soda, and salt. I sometimes skip the separate bowl if I’m feeling lazy (but then I double-check the baking soda’s actually in there... almost forgot it once, never again).
Add the dry stuff into the wet in two goes, stirring just until combined. Don’t overthink it—a few streaks of flour are OK.
Fold in nuts, chocolate chips, or both, if you’re going for it. Or neither, it’s fine. (This is usually the moment I sneak a taste. Shh.)
Scrape the batter into your prepared pan, aiming to spread it out more or less even (doesn’t really matter, it’ll settle).
Bake in the centre of the oven for 50-60 minutes (could be a little less or more; keep an eye from 45 min on). It’s done when a skewer comes out mostly clean—don’t stress about a bit of sticky crumb.
Let it cool in the pan for 10-15 minutes. Take it out to finish cooling on a rack. Good luck not tearing off an end to eat while it’s too hot—happens every time.

Stuff I Wish I Knew When I Started Baking This

If your sourdough starter is super tangy, the flavor comes through more the next day (actually, it mellows out nicely!).
Letting the bread cool properly means it slices way neater—learned that the hard way, oops.
If you sub oil for butter, it stays moister for longer, but really, both work great.
Once I tried adding shredded coconut—no idea what I was thinking. Not my best move, unless you’re coconut-obsessed.

Things I’ve Tried (That Usually Worked... Mostly)

Swapping half the flour for spelt or whole wheat—decent, honestly, just don’t expect it to rise quite as tall.
Mixing in blueberries—a bit messy, but the result was pretty nice.
I once thought matcha would be cool. It really wasn’t. I mean, unless you want green banana bread. Then by all means.

Gear I Use (And Clever Cheats)

Bread loaf tin (9 x 5 inch or so—if you’ve only got a cake tin, use that and bake a little less time).
A big mixing bowl. Or a saucepan if I’m short on clean dishes (no judgment).
Fork or potato masher for the bananas. I mean, shoes-off-and-hand-mash if you’re desperate. Been there!

How to Store It (If It Lasts!)

I usually wrap my banana bread in baking paper, then pop it in a bread box or just leave it on the counter under a tea towel. It’s good for 2-3 days, but honestly, it never survives past day one at ours. If you must, you can freeze slices; they defrost...eventually.

Serving It Up: What My People Love

This is best warm, with a hefty smear of salted butter (my dad piles on the butter like he’s trying to reenact a dairy commercial). My kids top theirs with Nutella, which is maybe blasphemous, but delicious. Or just a mug of tea—can’t go wrong there.

Mistakes I’ve Made (So Hopefully You Don’t Have To)

I once rushed and popped it out of the pan too early; it collapsed like an imploding cake. Actually, it still tasted great, just looked sad.
Don’t skimp on mashing the bananas. Big chunks equal weird pockets in the baked bread—trust me, I tried.
If you overmix after adding the flour, it gets rubbery (ask me how I know...)

Real-Life Questions I Get All The Time

Q: Can I make this vegan?
A: Sorta—I’ve tried with flax eggs and oil instead of butter, and it turned out decently. Not quite as rich, though. Worth trying if you’re dairy-free!

Q: How sour is the sourdough flavor?
A: Depends! If your starter is super tart, you'll taste it more. Otherwise, it's sorta background-y, just a subtle tang—my daughter hates "bread that tastes like vinegar" but even she likes this.

Q: Can I skip the nuts?
A: 100 percent. The bread is still great, maybe even better for school lunches. Or try pepitas if you want a little crunch.

Q: Do I have to use a stand mixer?
A: Not at all. I almost always use a spoon or an old whisk. My grannie swore by a wooden spoon, but I lose mine every time so... hands and a fork work too.

Oh and one more thing—if you have a dog who loves banana, guard your cooling loaf. I speak form experience; mine stole half a loaf. He looked so smug too.

Sourdough Banana Bread