There’s something special about pulling a pan of warm blueberry donuts from the oven, especially when the kitchen already smells like vanilla and sweet berries.

I started making Sourdough Discard Blueberry Donuts when I wanted a quick treat for the discard collecting in my refrigerator. Instead of frying dough, I spooned a simple batter into my donut pan, added plenty of blueberries, and baked them until soft and lightly golden.

Once the vanilla glaze went on, they disappeared quickly. Now these Sourdough Discard Blueberry Donuts are one of my favorite ways to turn leftover starter into an easy breakfast treat.

Why You’ll Love These Sourdough Discard Blueberry Donuts

These Sourdough Discard Blueberry Donuts combine the convenience of baked donuts with juicy blueberries and a sweet glaze. The sourdough discard adds moisture and a subtle tang that balances the sweetness.

Soft, moist centers
Juicy blueberries in every bite
Sweet vanilla glaze
Uses unfed sourdough discard
No frying required
No active starter needed
Quick baking time
Easy to make in a donut pan
Perfect for breakfast or brunch

Because baking powder and baking soda provide the lift, you don’t need to wait for fermentation. As a result, you can mix and bake these donuts whenever you have extra discard ready to use.

Ingredients for Sourdough Discard Blueberry Donuts

You only need simple baking ingredients to make Sourdough Discard Blueberry Donuts at home. Fresh blueberries work beautifully, although frozen berries also work when fresh ones aren’t available.

Ingredient Notes

Sourdough Discard: Use unfed discard from a flour-and-water starter. It adds moisture and mild sourdough flavor without requiring a feeding first.

All-Purpose Flour: Provides enough structure to hold the donut shape while keeping the interior tender.

Blueberries: Fresh blueberries provide juicy bursts of fruit throughout the donuts. If you use frozen blueberries, add them directly from the freezer rather than thawing them first.

Granulated Sugar: Sweetens the batter and balances the mild tang from the sourdough discard.

Whole Milk: Adds moisture and helps create a smooth batter. Room-temperature milk combines more easily with the other ingredients.

Egg: The egg provides structure and richness while helping the donuts stay soft.

Unsalted Butter: Melted butter adds richness and gives the donuts a tender texture. Let it cool slightly before adding it to the batter.

Vanilla Extract: Vanilla complements the blueberries while giving the donuts a classic bakery-style flavor.

Baking Powder and Baking Soda: These ingredients give the Sourdough Discard Blueberry Donuts their lift, so you don’t need an active starter.

Salt: A small amount balances the sweetness and brings out the blueberry and vanilla flavors.

For the Vanilla Glaze

Powdered Sugar: Creates a smooth, sweet glaze that sets nicely over the cooled donuts.

Milk: Thins the powdered sugar to the right dipping consistency.

Vanilla Extract: Adds warm vanilla flavor that pairs naturally with the blueberries.

Together, these ingredients create Sourdough Discard Blueberry Donuts with tender centers, juicy berries, and a smooth vanilla glaze. They’re simple enough for a relaxed weekend breakfast yet pretty enough for a brunch table, especially when you finish them with an extra drizzle of glaze.

How to Make Sourdough Discard Blueberry Donuts

Making Sourdough Discard Blueberry Donuts is quick because you don’t need to knead, ferment, or fry the dough. Instead, mix the batter gently, fold in the blueberries, and bake the donuts until soft and lightly golden.

1. Prepare the Donut Pan

Preheat the oven to 350°F (175°C).

Lightly grease a standard donut pan with butter or nonstick cooking spray. Make sure you grease around the center posts so the donuts release cleanly after baking.

2. Combine the Dry Ingredients

In a medium mixing bowl, whisk together:

All-purpose flour
Baking powder
Baking soda
Salt

Set the mixture aside while you prepare the wet ingredients.

3. Mix the Wet Ingredients

In a large bowl, whisk the granulated sugar and egg until combined.

Next, add the sourdough discard, whole milk, melted butter, and vanilla extract. Whisk gently until the mixture looks mostly smooth.

For the best texture, let the melted butter cool slightly before adding it so it blends smoothly with the other ingredients.

4. Make the Donut Batter

Gradually add the dry ingredients to the wet mixture.

Use a spatula to fold everything together just until you no longer see dry streaks of flour. The batter should look thick but spoonable.

Most importantly, don't overmix. Excessive mixing can make baked Sourdough Discard Blueberry Donuts tougher instead of soft and tender.

5. Fold in the Blueberries

Gently fold the blueberries into the batter.

If you're using fresh blueberries, make sure they're clean and completely dry. Meanwhile, if you're using frozen blueberries, add them straight from the freezer. Thawing them first can release excess juice and discolor the batter.

Fold only a few times so you don’t crush the berries.

6. Fill the Donut Pan

Transfer the batter to a piping bag or large zip-top bag and snip off one corner. Then pipe the batter evenly into each donut cavity.

Fill each cavity about ¾ full so the donuts have enough room to rise without losing their center holes.

Alternatively, carefully spoon the batter into the pan.

7. Bake the Donuts

Bake the Sourdough Discard Blueberry Donuts for approximately 12 to 15 minutes.

The donuts should look lightly golden around the edges, and the tops should spring back gently when touched.

You can also insert a toothpick into a section without a blueberry. It should come out clean or with a few moist crumbs.

8. Cool Before Glazing

Let the donuts cool in the pan for about 5 minutes.

Then gently loosen the edges and transfer them to a wire cooling rack. Allow them to cool completely before adding the glaze.

Glazing warm donuts can cause the icing to melt and run off instead of creating the smooth coating shown in the finished recipe.

9. Make the Vanilla Glaze

Add powdered sugar, milk, and vanilla extract to a small bowl.

Whisk until smooth. Start with a small amount of milk, then gradually add more until the glaze reaches a thick but pourable consistency.

For a thicker white coating, use less milk. Alternatively, add another teaspoon of milk for a thinner glaze that’s easier to drizzle.

10. Glaze the Donuts

Dip the top of each cooled donut into the vanilla glaze, then lift it and allow the excess to drip back into the bowl.

Place the glazed donuts on a wire rack and let the coating set for about 15 to 20 minutes.

For the look in the photo, you can finish the Sourdough Discard Blueberry Donuts with a light second drizzle of glaze after the first coating begins to set.

Common Mistakes to Avoid

A few small details can make the difference between light, tender donuts and dense or dry ones.

Overmixing the Batter

Once you add the flour, fold the batter only until combined. Overmixing develops more gluten, which can make the donuts tougher.

Adding Wet Blueberries

Dry fresh blueberries thoroughly before adding them. Extra surface moisture can affect the batter around the berries.

Thawing Frozen Blueberries

Add frozen blueberries directly to the batter. Otherwise, thawed berries can release a lot of juice and turn the batter streaky and overly wet.

Overfilling the Donut Pan

Fill each cavity approximately ¾ full. Adding too much batter can cause the donuts to rise over the center posts and partially close the holes.

Overbaking

Since baked donuts can dry out quickly, start checking them at 12 minutes. Remove them once the tops spring back and the centers have set.

Glazing While Warm

Let your Sourdough Discard Blueberry Donuts cool completely before dipping them. Otherwise, the glaze can become thin, translucent, and messy instead of forming a neat coating.

Sourdough Discard Blueberry Donut Variations

You can easily customize Sourdough Discard Blueberry Donuts without changing the basic recipe.

Lemon Blueberry

Add 1 tablespoon fresh lemon zest to the batter. Then replace some of the milk in the glaze with fresh lemon juice for a bright lemon-blueberry finish.

Blueberry Streusel

Skip the glaze and sprinkle a simple cinnamon-brown sugar streusel over the batter before baking. This variation adds a lightly crunchy bakery-style topping.

Mixed Berry

Replace half of the blueberries with finely chopped strawberries or raspberries. Keep the total amount of fruit the same so you don’t add too much moisture.

Cinnamon Sugar

Skip the vanilla glaze. Instead, lightly brush the warm donuts with melted butter and coat them with cinnamon sugar for a simpler finish.

Expert Tips for the Best Sourdough Discard Blueberry Donuts

A few simple techniques will help your Sourdough Discard Blueberry Donuts stay soft, moist, and full of juicy blueberries.

Measure the Flour Carefully

Too much flour can quickly make baked donuts dry. For consistent results, weigh the flour with a kitchen scale or spoon it gently into the measuring cup and level the top.

Don’t Overmix

Fold the dry ingredients into the wet mixture only until combined. Additionally, fold the blueberries in gently so they stay whole instead of releasing juice throughout the batter.

Use Room-Temperature Ingredients

Bring the egg, milk, and sourdough discard closer to room temperature before mixing. This helps the ingredients combine smoothly and creates a more even batter.

Fill the Pan Evenly

A piping bag makes filling the donut cavities easier and cleaner. Fill each cavity about ¾ full so the donuts rise evenly while keeping their classic center holes.

Watch the Baking Time

Begin checking around 12 minutes. Because baked donuts contain less fat than fried donuts, overbaking can dry them out quickly.

What to Serve With Sourdough Discard Blueberry Donuts

These Sourdough Discard Blueberry Donuts make a sweet addition to breakfast or brunch, especially when you pair them with something warm to drink or a more savory dish.

For a cozy pairing, serve the glazed donuts with Spicy Chai. The warm spices complement the sweet blueberries and vanilla glaze without overpowering their fruity flavor.

For a bigger weekend breakfast, serve them alongside Sourdough Discard Pancakes with fresh fruit and maple syrup. Meanwhile, Sourdough Discard Bagels provide another savory option for guests who prefer cream cheese, eggs, or breakfast sandwiches.

Other easy serving ideas include:

Fresh strawberries and blueberries
Greek yogurt
Scrambled eggs
Fresh fruit salad
Hot coffee
Cold milk
Vanilla yogurt
Whipped cream

Whether you serve them with Spicy Chai for a quiet morning or add them to a full brunch spread, Sourdough Discard Blueberry Donuts bring a soft texture, juicy berries, and sweet vanilla flavor to the table.

How to Store Sourdough Discard Blueberry Donuts

These Sourdough Discard Blueberry Donuts taste best on the day you make them, especially after the vanilla glaze sets. However, proper storage helps keep leftovers soft.

Let the donuts cool completely before storing them. Keep glazed donuts in an airtight container at room temperature for up to 2 days. Place parchment paper between layers to protect the glaze.

For longer storage, refrigerate them for up to 4 days. Let refrigerated donuts sit at room temperature for a few minutes before serving for a softer texture.

You can also freeze unglazed donuts for up to 3 months. Wrap each cooled donut individually, then place them in a freezer-safe container. Thaw at room temperature and add fresh vanilla glaze before serving.

Frequently Asked Questions

Can you make donuts with sourdough discard?

Yes. Sourdough Discard Blueberry Donuts are an easy way to use unfed starter because the discard adds moisture and mild tang to the batter. Baking powder and baking soda provide the lift, so you don’t need an active or recently fed starter.

Can I use sourdough discard straight from the fridge?

Yes, you can use refrigerated sourdough discard. However, bringing it closer to room temperature helps it combine more smoothly with the milk, egg, and melted butter.

Can you add blueberries to sourdough discard?

Absolutely. Blueberries pair especially well with the subtle tang of sourdough discard. Fresh berries work well, while frozen blueberries also work if you add them directly from the freezer without thawing.

Why are my baked sourdough donuts dry?

Overbaking and using too much flour are two common causes. Measure your flour carefully and start checking the Sourdough Discard Blueberry Donuts around the 12-minute mark. Additionally, mix the batter only until the ingredients come together.

Can you freeze Sourdough Discard Blueberry Donuts?

Yes. For the best results, freeze the donuts before glazing. Once they cool completely, wrap them individually and freeze for up to 3 months. After thawing, dip them in freshly prepared vanilla glaze.

Can I make these donuts without a donut pan?

A donut pan gives you the most consistent shape. However, if you don’t have one, you can bake the batter in a muffin pan. The result won’t have the traditional donut shape, but you’ll still get the same blueberry and sourdough flavors.

These Sourdough Discard Blueberry Donuts turn leftover starter into a soft, fruity breakfast treat without the mess of frying. Juicy blueberries add fresh flavor to every bite, while the vanilla glaze gives the baked donuts a sweet bakery-style finish.

Moreover, the recipe doesn’t require an active starter or a long fermentation. Simply mix the batter, fold in the blueberries, bake, and glaze.

Serve these Sourdough Discard Blueberry Donuts with Spicy Chai for a cozy breakfast, or add them to a weekend brunch alongside your favorite savory sourdough recipes. They’re simple, versatile, and a delicious way to put extra discard to good use.

Sourdough discard blueberry donuts

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