Sourdough Banana Streusel Muffins

These deliciously moist, melt-in-your-mouth, sourdough banana streusel muffins are the perfect use for your starter discard. The rich buttery flavor and crumbly brown sugar topping will definitely keep you coming back for more.
sourdough banana streusel muffin

using your sourdough discard to make sourdough banana streusel muffins

If you are new to keeping a sourdough starter, you may be aghast at the amount of “waste” your starter produces. Throwing away cup after cup of quality (read: expensive!) flour is nearly enough to make you give it up entirely. But the good news is, you don’t have to! There are tons and tons of delicious recipes that can be made with that beautiful sourdough discard, and using your sourdough discard to make sourdough banana streusel muffins is one of the most rewarding!

Sourdough discard is a byproduct of managing a sourdough starter. During the beginning stages of creating your starter, the discard has not yet matured enough to actually produce rise in your recipes. But it still adds an incredible flavor to your recipes that is hard to reproduce with other substitutes. The closest sub that I can think of is buttermilk, which also gives recipes a pleasantly “sour” rich flavor.

Using your sourdough discard to make sourdough banana streusel muffins

Ingredients for sourdough banana streusel muffins

The ingredient list for this recipe mostly contains regular pantry staples. Another reason this is one of my Go-To recipes!

To make these muffins, you will need:

  • 1 3/4 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon kosher salt
  • 1/8 tsp cinnamon
  • 8 tablespoons salted butter (1 stick)
  • 1 cup packed light brown sugar
  • 2 large eggs, beaten
  • 1 3/4 teaspoons pure vanilla extract
  • 5-6 very ripe bananas, mashed separately in a bowl
  • 1/2 cup sourdough starter discard

For the (streusel) crumb topping

  • 1 1/4 cup all purpose flour
  • 1/2 cup brown sugar
  • 1/3 cup sugar
  • 1 small pinch of salt
  • 6 Tbsp salted butter, melted and cooled

How to make sourdough banana streusel muffins

Start by preheating your oven to 350. To make these muffins, begin by sifting together your flour, baking soda, cinnamon and 1/2 tsp salt in a large mixing bowl.

add baking soda to flour
add salt to flour mix

Next, melt the stick of butter and cream together the butter and brown sugar.

cream together butter and brown sugar

Then, once the butter has cooled slightly, add in the eggs and beat together until the mixture is light and fluffy.

add in eggs and whip until fluffy

Then, stir in your pure vanilla extract.

add pure vanilla extract

Next, in a separate bowl, mash together the 5-6 ripe bananas. I use a potato masher for this, but you can also just use the back of a fork. Some people will tell you to leave chunks of banana. Don’t do it. Nobody wants a slimy chunk of half mashed banana grazing the top of their soft palette mid bite. Blek.

5 or 6 ripe bananas

Okay, maybe that’s personal preference. But my advice? Mash until there are no visible chunks. Then mash vigorously again, just in case any snuck past you. Then one more time, for good measure. Banana paste is the goal. No chunks.

mash the bananas

Add the mashed banana (banana paste) into the creamed butter and brown sugar mixture. Stir well to combine.

mix banana and creamed brown sugar

Add your sourdough discard into the mixture and stir to blend.

sourdough discard banana muffin

Slowly add in the flour mixture and stir well to incorporate all of the wet and dry ingredients.

blend wet and dry ingredients

sourdough banana muffin mix

Line or spray your muffin tin and carefully spoon out batter into each cup. I like to add batter a little more than halfway up the muffin cup.

pour banana muffin batter into cups

Making the crumb (streusel) topping

Now it’s time to make the crumb (streusel) topping. Begin by mixing together the flour, brown sugar, pinch of salt and table sugar.

making the crumb topping

Next, slowly add in the melted, cooled butter a little bit at a time. Stir together with the mix with a fork until the mix is crumbly. If the mixture comes together in crumbs before you use all the butter, that’s okay. Don’t feel like you have to use it all.

adding butter to crumb topping
crumb topping for banana muffins

Then, spoon out(or use your hands) a large heap of crumb topping onto each unbaked muffin cup. Be generous. There’s plenty of topping for 24 muffins!

top muffins with streusel
banana muffins with crumb topping

Lastly, slide the prepared muffins into a preheated oven and bake for 30-35 minutes, or until a toothpick comes out clean. The tops should be crumbly and golden and the muffin should be soft, moist, and fully cooked through. Time to enjoy!

banana sourdough muffins with crumb topping

FAQ and substitutions for sourdough banana streusel muffins

What makes muffins light and fluffy? A few things. Creaming together your butter and sugars helps significantly when making cakes, muffins, cookies, and other baked goods. And also using room temperature ingredients helps everything come together smoothly, which more easily traps air and allows your baked goods to expand in the heated oven.

What does the sourdough discard do in muffins? Because sourdough starter does have natural yeast, even immature starter may* help baked goods to rise. But more importantly, it is all about the flavor! Sourdough has a tangy, fruity, “sour” flavor that is hard to reproduce by other methods.

Can I sub anything for the sourdough starter? Yes. If you haven’t created your own sourdough starter yet, you can substitute 1/2 cup of sour cream or 1/4 cup full fat buttermilk to achieve similar results. Baking time may vary slightly.

Can I sub oil for the butter? Although it often is okay to substitute oil for butter in baked goods, the butter in this particular recipe is absolutely essential for the flavor. However, if you must omit butter due to dietary restrictions, I suggest using coconut oil + a few tsp of non dairy butter extract to add back in the butter flavor.

DID YOU MAKE IT? LET ME KNOW BY LEAVING A REVIEW BELOW OR TAGGING ME WITH A PIC ON INSTAGRAM @GOOD.TO.GATHER
sourdough banana streusel muffin

Sourdough Banana Streusel Muffin

Callie Morgan
These deliciously moist, melt-in-your-mouth, sourdough banana streusel muffins are the perfect use for your starter discard. The rich buttery flavor and crumbly brown sugar topping will definitely keep you coming back for more.
5 from 2 votes
Prep Time 15 minutes
Cook Time 35 minutes
Course Bread, Breakfast, Snack
Cuisine American
Servings 24 muffins

Ingredients
  

  • 8 Tbsp butter
  • 1 Cup light brown sugar
  • 2 medium eggs
  • 1 3/4 tsp pure vanilla extract
  • 5-6 ripe bananas, mashed
  • 1/2 Cup sourdough discard
  • 1 3/4 Cup all-purpose flour
  • 1/2 tsp kosher or coarse sea salt
  • 1/8 tsp cinnamon optional
  • 1 tsp baking soda

Streusel Topping

  • 1 1/4 Cup all purpose flour
  • 1/2 Cup brown sugar
  • 1/3 Cup table sugar
  • 1 pinch salt
  • 6 Tbsp melted, cooled salted butter

Instructions
 

  • Begin by sifting together your flour, baking soda, cinnamon, and 1/2 tsp salt in a large mixing bowl.
    1 3/4 Cup all-purpose flour, 1/2 tsp kosher or coarse sea salt, 1 tsp baking soda, 1/8 tsp cinnamon
  • Next, in a new bowl, melt the stick of butter and cream together the butter and brown sugar.
    8 Tbsp butter, 1 Cup light brown sugar
  • Once the butter has cooled slightly, add in the eggs and beat together until the mixture is light and fluffy. Then add the vanilla extract and stir.
    2 medium eggs, 1 3/4 tsp pure vanilla extract
  • Next, in a separate bowl, mash together the 5-6 ripe bananas. Add the mashed banana (banana paste) into the creamed butter and brown sugar mixture. Stir well to combine.
    5-6 ripe bananas, mashed
  • Add your sourdough discard into the mixture and stir to combine.
    1/2 Cup sourdough discard
  • Finally, slowly add the flour mixture into the banana mixture and stir well to incorporate all of the wet and dry ingredients.
  • Line or spray your muffin tin and carefully spoon out batter into each cup. I like to add batter a little more than halfway up the muffin cup. Once all the cups are halfway full, set the prepared muffin tin aside to make the topping.

Streusel Topping

  • Mix together the flour, sugars, and salt in a medium bowl. Slowly pour in the melted, cooled butter a little at a time while stirring the mixture with a fork. The mixture should begin coming together into a crumbly mixture. If the mixture comes together before you have added all the butter, that's okay. You want it crumbly, not sticky.
    1 1/4 Cup all purpose flour, 1/2 Cup brown sugar, 1/3 Cup table sugar, 1 pinch salt, 6 Tbsp melted, cooled salted butter
  • Spoon out a generous amount of crumb topping onto the top of each unbaked muffin.
  • Bake the prepared muffins in the preheated oven for 30-35 minutes, or until a toothpick comes out clean.

Notes

Baked muffins can be store in an airtight container for up to 4 days at room temperature.
Baked muffins can be frozen for up to six weeks in a freezer safe ziploc gallen bag.
I do NOT recommend making this batter ahead of time since the bananas will oxidize and begin turning brown.
Keyword banana, banana muffin, Breakfast, brunch, muffin, sourdough discard

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5 Comments

  1. 5 stars
    Love love love this recipe!! Best banana bread discard recipe I’ve tried by far!! I only had 4 bananas unfortunately but still tasted amazing! I added a 1/4 cup of maple syrup to make up for the sweetness of the 1-2 bananas I was lacking cuz my family like extra sweet and it turned out great!

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