Sourdough Discard Banana Muffins

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My sourdough discard banana bread muffins are the kind of easy, cozy bake you can mix together in minutes, especially on mornings when you need something warm and familiar.

The sourdough discard adds extra moisture and depth, giving the muffins that classic banana bread flavor with an even softer crumb.

They’re a perfect way to use up overripe bananas and leftover discard without feeling like you’re doing any extra work. Each muffin bakes up tender, lightly sweet, and full of that nostalgic banana-bread smell that fills your whole kitchen.

These are great for busy mornings, after-school snacks, or stocking the freezer for grab-and-go breakfasts. They also stay soft for days, making them a reliable option when you want something simple, homemade, and kid-friendly.

Whether you make them plain or fold in chocolate chips, walnuts, or cinnamon, they’re the kind of muffins everyone reaches for first. And because the batter is so forgiving, they turn out beautifully even on the busiest days.

Final shot of sourdough discard banana muffins. Three muffins stacked on top of each other.

Sourdough discard banana bread muffins are perfect for cozy fall mornings when the air gets crisp and you want something warm and comforting to start the day.

They also fit perfectly into the back-to-school season since they make an easy breakfast or lunchbox treat.

In the winter months, these muffins feel extra homey, especially on snowy mornings or lazy weekends when you want a simple bake that fills the house with that nostalgic banana-bread smell.

They’re also great for holiday brunches, Christmas week slow mornings, and New Year’s Day breakfast spreads.

Spring events like baby showers, teacher appreciation breakfasts, and Easter brunch pair perfectly with these muffins because they feel fresh, soft, and universally loved. They bring a homemade touch without requiring much time or planning.

During summer, they’re ideal for road trips, pool days, and weekend getaways since they pack well and stay moist even in warm weather. They also make a great grab-and-go snack for busy family days or early morning sports practices.

Birthdays, playdates, potlucks, and church gatherings are all easy occasions to bring these muffins because they appeal to both kids and adults.

No matter the season or event, sourdough discard banana bread muffins feel familiar, comforting, and always welcome on the table.

If you're looking for another sourdough muffin recipe, check out my sourdough chocolate chip muffins! Looking for another way to use your bananas and sourdough? Try these sourdough breakfast cookies!

This recipe also inspired my pumpkin banana bread muffins! They’re sweet, soft and perfect for fall.

Ingredients

Ripe bananas (the bananas pictures above are the absolute earliest I would use them! I prefer to use them when they are a little bit more brown.)
Egg
Vanilla extract
Brown sugar
Sourdough discard
Melted butter
All-purpose flour
Salt
Baking powder
Baking soda
Salt
Cinnamon
Nutmeg
Cardamom

See the recipe card for quantities and ingredients for the optional streusel topping.

Instructions

Step 1 of sourdough discard banana muffins. Dry ingredients mixed in a bowl.

Step 1: Preheat your oven to 425; in a small bowl mix flour, baking powder, baking soda, salt, cinnamon, nutmeg, and cardamom.

Step 2 of sourdough discard banana muffins. Wet ingredients mixed in a bowl.

Step 2: In a medium bowl, mash bananas thoroughly and add in melted butter, sourdough discard, vanilla extract, brown sugar, and the egg. Mix until just combined.

Step 3 of sourdough discard banana muffins. Finished batter mixed in a bowl.

Step 3: Add dry ingredients to the wet ingredients and mix until fully incorporated. Be careful not to over-mix because over-mixing will impact the rise of the muffin.

Step 4 of sourdough discard banana muffins. Muffin batter in a muffin pan.

Step 4: Evenly divide the batter on a prepared 12-muffin baking sheet.

Step 5 of sourdough discard banana muffins. Streusel crumble topping ingredients mixed in a bowl.

Step 5: Mix streusel topping ingredients and generously top each muffin. Use all of it! Even if it seems like too much. Just trust me.

Step 6 of sourdough discard banana muffins. Muffin batter in muffin pan with streusel topping on top.

Step 6: Bake for 5 mins at 425 and then switch to 350 for another 15-16 mins or until you can stick a toothpick in it and it comes out with just a few crumbs. Don’t open the oven when you change the temp!

Hint: Want even taller muffins? Chill the batter covered overnight for 8-12 hours. This will ferment your dough and also help it rise more!

Substitutions

Some of the listed ingredients not work for you? Here are a few of my tried and true substitutes!

Milk: Use high-fat non-dairy milk if you don't want to use dairy! I highly recommend Oatly oat milk (full fat or regular would be ideal).
Butter: Use a non-dairy butter like Country Crock's plant butter. A neutral oil (like coconut oil) would work well here too!

Variations

Extra crunch - Add chopped walnuts or pecans to give these an extra crunch!
Chocolate - Add 1 cup of chocolate chips to add some rich, chocolatey goodness!

See this chocolate chip sourdough discard muffin recipe!

Equipment

Small mixing bowl
Medium mixing bowl
12-muffin pan
Muffin liners (or just butter the pan)
Kitchen Scale (optional but HIGHLY recommended)
Batter scoop (optional - you can use a spoon)

Storage

For best results, store in an airtight container at room temperature for 3-5 days.

Sourdough banana bread muffins can be frozen for up to 3 months, however, the streusel will be significantly softer after being thawed. It will be very yummy still, though!

Top tip

Don't over-mix your batter! Over-mixing can lead to flat, sad muffins that don't rise.

FAQ

Can I use an active starter instead of discard?

Yes! I do recommend using a weighted scale here especially to make sure you are adding the right amount (100g) of sourdough to the mix. Active starter has more air in it so 1 cup of it will inevitably weigh less than 1 cup of unfed discard.

Looking for other muffin recipes like this? Try these: