Sourdough Blueberry Muffins with Crumb Topping
This is the best sourdough blueberry muffins recipe! This bakery style blueberry muffin is tender and moist with a thick crumb topping that is crunchy and delicious!

We love to use sourdough discard to flavor baked goods. Just like our sourdough morning glory muffins, sourdough banana nut muffins, and our double chocolate sourdough muffins, this blueberry muffin recipe packs a lot of flavor!
Serve these muffins for breakfast, as a midday snack, or even dessert!
This recipe makes 12 large, bakery-style muffins.
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Step by step instructions
To make the very best, bakery-style muffins you'll need 3 bowls. One for the wet ingredients, one for the dry ingredients, and one for the crumb topping.
- Crumb Topping: Prepare the crumb topping by melting the butter and stirring the flour and sugar in with a fork. Make sure the crumbles are kept a large size, so don't over-mix. Set aside.
- Preheatย the oven toย 350ยฐF (176ยฐC). Line a 12-count muffin tin with paper liners or grease generously to prevent sticking.
- Dry Ingredients: In a large mixing bowlย combineย the flour, sugar, baking soda, baking powder, cornstarch, and salt with a fork.ย Addย the blueberries and toss the mixture to coat.ย Setย aside.
- Wet Ingredients: In a medium mixing bowl, whisk the wet ingredients together and then pour into the dry ingredients. Gently stir the mixture until just combined. Don't over-mix the batter.
- Spoon the mixture evenly into a 12-count muffin tin and press the crumble topping over the muffin batter.
- Bake the muffins for 30-35 minutes or until a toothpick inserted into the center comes out clean.
How to make the best crumb topping
The crumb topping might just be the best part of this recipe! The topping covers the muffins with a layer of buttery sweet and crunchy morsels that take these muffins to another level!
To make the crumble, melt the butter and then use a fork to stir the flour and sugar until it looks like wet chunks. Don't break up the chunks too much, you want them to be large!
After spooning the crumb topping into each muffin, gently press the crumbs into the muffin batter. This will make them adhere to the batter and stay put while the muffins are baking.

Either fresh or frozen blueberries can be used in this recipe. I like to freeze fresh blueberries before adding them to the muffin batter because they stay more intact during the baking process.
Greek yogurt can be used in place of the sour cream.
Don't have a kitchen scale to measure flour?
Use the scoop and level technique to measure your flour if you do not have a kitchen scale. To do this, use a spoon to fluff up the flour in the bag. Use a spoon to scoop the flour into a measuring cup until it is heaped on top. Take a butterknife and level off the top. This should give you the most accurate measurement for flour.
Because flour is measured by weight in these recipes, if the flour is scooped straight out of the bag with the measuring cup, there will be more flour than is called for in the recipe.
Are you or someone you know looking for a gluten-free flour version? Red's Reality's gluten free blueberry muffins recipe is easy and delicious!
How to store and freeze
Store the muffins at room temperature, loosely covered, or up to 3 days.
To freeze the muffins, allow them to cool completely. Wrap each one in plastic wrap and insert it into a freezer-safe bag. The muffins can be frozen for up to 3 months.
When you are ready to eat them, allow them to thaw at room temperature. Reheat them in the microwave for 20-second intervals until warm. You can also reheat them in the oven at 300ยฐF (149ยฐC) for 6-10 minutes.
Check out more of our delicious sourdough recipes!
- sourdough lemon cake
- sourdough berry sweet rolls
- sourdough banana bread
- chocolate chip sourdough scones
- sourdough pumpkin bread

Sourdough Blueberry Muffins with Crumb Topping Recipe
EQUIPMENT
- 12 count muffin tin
INGREDIENTS
Dry Ingredients
- 2 cups (240 g) all purpose flour
- 1 cup (200 g) granulated sugar
- 2 teaspoons baking powder
- ยฝ teaspoon baking soda
- ยฝ teaspoon salt
- 1 tablespoon corn starch
- zest of half a lemon
- 1 cups (150 g) blueberries (fresh or frozen)
Wet Ingredients
- 8 tablespoons (113 g) butter (melted)
- 2 large eggs
- ยฝ cup (125 g) sourdough starter discard
- 3 tablespoons (45 g) sour cream (or plain Greek yogurt)
- 1 teaspoon (5 g) vanilla extract
Crumb Topping
- 3 tablespoons (45 g) butter ( melted)
- ยฝ cup (100 g) granulated sugar
- ยฝ cup (60 g) all purpose flour
INSTRUCTIONS
- Crumb topping: Place the melted butter, flour and sugar in a bowl and use a fork to mix until it becomes a coarse crumble. Set aside.
- Preheat the oven to 350ยฐF (176ยฐC). Line a 12 count muffin tin with paper liners or grease generously to prevent sticking.
- Dry ingredients: In a large mixing bowl combine the flour, sugar, baking soda, baking powder, corn starch, lemon zest and salt with a fork. Add the blueberries and toss the mixture to coat. Set aside.
- Wet ingredients: In a medium mixing bowl, whisk all the wet ingredients until smooth. Pour the wet ingredients into the dry ingredients and stir until just combined. (If the batter is too stiff, add 1-2 tablespoons of water or milk to help thin it down.)
- Divide the batter evenly into 12 muffins and sprinkle the top with the crumble topping. Make sure to press the crumble, gently, on the top of the batter.
- Bake for 30-35 minutes or until a toothpick inserted into the center of a muffin comes out clean. Let muffins cool in the tin for 10 minutes before removing to cool on a cooling rack.
NOTES
- Store the muffins loosely covered, at room temperature, for up to 3 days.
- Freeze the muffins wrapped in plastic wrap, inserted into a freezer-safe bag for up to 3 months.




There WAY too much crumb topping. I would cut the topping in half and there would still be a sufficient amount. I have no idea why the butter measurement is 8 tbsps when itโs easier to say (and measure) a half cup of melted butter. Finally, you will definitely need to add liquid at the end - at least 2-3 tbsp of water or milk. Overall great recipe! Amazing flavour!
I'm a little lazy, so I made the recipe into a bundt cake instead of muffins. Delicious!!! What I did realize about the recipe is that if you measure grams of flour, you will not have to add milk to the recipe. If you use cups of flour, you will have to add a few table spoons of milk. For me, flour in grams vs cups are at least a quarter cup different. Sugar measured the same. Hmm!
Thank you for sharing your tips!
My whole family loved this recipe!! We ate them as soon as they were cool enough to put in our mouths. Delicious!
Love all of the recipes Iโve tried so far! You are fabulous littlespoonfarm! Thank you for sharing your recipes!!!
Can you let this batter ferment in the fridge over night?
Yes, but leave out the leavening agents and mix them in before baking.
Best muffins I've ever made. Let them cool completely before you eat them, though.
Insanely good! And I wish I could bottle the way they made my house smell! I had to add more like 3-4 tablespoons of milk at the end because my batter was super thick, but I measured with a cup rather than by weight. They turned out great in the end.
This is my 4th of 5th recipe of yours Iโve tried and they have ALL been phenomenal! You just canโt miss!! Wonderful, bakery-esque blueberry muffins!!
success! the best thing I've made with s.d.so far. I've failed at bread so far. I'll keep trying. but these muffins are the best!
My daughter requested bakery- style blueberry muffins this morning and this recipe came through! They were delicious and came out perfect.
These were delicious! My only issue was that they fella Bart easily. Any suggestions?
These were excellent! The best bluebery muffins Iโve ever made. Will definitely be my go to recipe going forward.