Sourdough Discard Lemon Blueberry Bread (Active Starter Works Too)

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This sourdough discard lemon blueberry bread is one of those recipes that feels like spring no matter what time of year you make it. Fresh lemon zest, fresh lemon juice and frozen blueberries folded into a tender, lightly sweet loaf. It gets a lemon glaze poured on while it is still warm and soaks straight in. Two loaves come out of one batch, which means you have one to keep and one to give away.

You do not need an active starter for this. Discard works perfectly. The starter is here for a little tang and depth of flavor, not for lift. Baking powder and baking soda do that work. If you do have an active starter you want to use up, that works too. Either way, measure it by weight. 120 grams.

I made every mistake possible the first time I made this. Forgot the milk. Skipped the flour trick on the blueberries. Trusted the toothpick instead of my thermometer. I am going to walk you through all of it so you do not have to learn the hard way like I did.

Supplies

Here is everything I used for this recipe.

(Affiliate links below.)

Kitchen Scale - Measure your starter accurately every time. 120g is the target.

TempPro Instant Read Thermometer - Skip the toothpick test. This is the only reliable way to know your bread is done.

Loaf Pan Parchment Inserts - Line your pans without greasing. A small spritz of cooking spray keeps the liner from sliding when you pour the batter.

Disposable Aluminum Loaf Pans with Lids 50 Pack - Perfect if you are baking to give one away. Bake it, glaze it and hand it over without worrying about getting your pan back.

Jump to Recipe

How to Make Sourdough Discard Lemon Blueberry Bread

Start with fresh lemons. Not bottled juice. The zest is what makes this bread taste like lemon instead of just sweet, and you cannot get that from a bottle. You need one tablespoon of zest and two tablespoons of fresh juice. Zest your lemons first, then juice them. It is much easier in that order.

Your starter goes in with the wet ingredients. Measure it by weight, 120 grams, whether you are using active starter or discard. If you are pulling discard straight from the refrigerator, no feeding needed. Give it a quick stir and measure it out. The starter adds a subtle tang that balances the sweetness of the glaze really well.

Combine all your wet ingredients in one bowl and your dry ingredients in another. Pour wet into dry and stir until just combined. Do not over-mix.

Once you see the flour disappear, stop.

Now the most important step before your batter goes into the pans. Toss your frozen blueberries in one to two tablespoons of flour before you fold them in. Do not skip this. The flour coating absorbs the excess moisture from the frozen berries and keeps them suspended in the batter instead of sinking to the bottom. I learned this the hard way.

Divide the batter evenly between your two prepared pans. If you are using parchment inserts, a small spritz of cooking spray on the bottom of the pan keeps the liner from sliding when you pour.

Bake at 350 degrees Fahrenheit for 50 minutes.

Pull them out and let them cool for five to ten minutes before glazing. You want them warm, not hot. The glaze soaks in better when the bread has settled a little. Mix your powdered sugar and fresh lemon juice until it ribbons off a spoon and pour it over both loaves while they are still in the pans.

The gifting note. These bake up perfectly in disposable aluminum loaf pans with lids. Bake it, glaze it right in the pan and snap the lid on. No transferring, no wrapping, no worrying about getting your pan back. These are on Amazon in a 50 pack and they are worth having on hand any time you are baking for someone else.

What Went Wrong the First Time (And How to Avoid It)

I am going to be honest with you because that is the whole point of this blog. The first time I made this bread, I made every mistake in the book. All at once.

I forgot the milk. I noticed the second I set the pans down and turned around. So I pulled them back out, dumped the batter into the bowl and stirred it in. But the frozen blueberries had already started to melt without the flour coating. The added milk combined with the watery blueberries turned the whole batter purple and soupy. It went into the oven anyway.

Then I used the toothpick test to check for doneness. It came out clean, so I pulled the loaves. By the time they were cooling on the rack the centers had already started to fall. Doughy in the middle, fully baked on the outside. The toothpick lied.

I scooped out the fallen doughy centers and threw them into a muffin tin to try to save what I could. The muffins actually turned out the best of anything that day.

I learned from my mistakes so you don't have to, I have perfected the recipe that works consistently, and that is the one you are going to make.

Ready to bake? Jump to the full recipe at the bottom of this post.

Frequently Asked Questions

Can I take my starter out of the refrigerator and use it directly in this recipe?

Yes. For a discard recipe like this one, you do not need to feed your starter first. Pull it straight from the refrigerator, give it a stir and measure out 120 grams. The starter is here for flavor only. The baking powder and baking soda do all the heavy lifting for rise and structure.

If you want to use an active starter instead, it should be fed and at peak before you measure it. Either way, 120 grams is your target.

Can I use fresh blueberries instead of frozen?

Yes, but you may need to adjust slightly. Fresh blueberries release less moisture than frozen, so the batter will be a little less wet. Still toss them in flour before folding in to help keep them distributed evenly throughout the loaf.

Can I make this as one large loaf instead of two?

The recipe is written for two standard loaf pans. If you want to make one large loaf, know that your bake time will increase and the thermometer test becomes even more important. Pull it at 200 to 205 degrees F in the dead center regardless of how long it has been in the oven.

You may also need to tent the top of the pan with aluminum foil towards the end of cooking to keep it from browning too much and/or put a pan under your loaf pan to keep the bottom from burning. Not a big deal, just keep an eye on what is happening with your loaf and make some small adjustments.

Can I freeze this bread?

Yes. Let the loaves cool completely and skip the glaze on the loaf you plan to freeze. Wrap tightly and freeze for up to three months. Add the glaze fresh after thawing.

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Pro Tips

Always use a thermometer, not a toothpick. Insert an instant read thermometer into the dead center of the loaf. You are looking for 200 to 205 degrees F. A clean toothpick does not mean a fully baked center. It means the toothpick did not hit a wet pocket. Those are two different things. The TempPro instant read thermometer is what I use and it has never lied to me.

Flour your frozen blueberries. Toss them in one to two tablespoons of flour before you fold them into the batter. This absorbs the excess moisture from the frozen berries and keeps them suspended throughout the loaf instead of sinking straight to the bottom. Skip this step and your blueberries will end up exactly where mine did the first time.

Measure your starter by weight. Volume measurements for starter are unreliable because the density changes depending on how active or how deflated it is. 120 grams on a kitchen scale is the same every single time.

Use parchment inserts. Parchment pan liners mean you never have to grease your pans and cleanup is almost nothing. A small spritz of cooking spray in the pan before you drop the liner in keeps it from sliding when you pour the batter.

Find Everything I Used in One Place

All of the tools and products I used for this recipe are saved in my Amazon storefront. You will find the thermometer, the parchment inserts, the disposable loaf pans and more in my Sourdough Baking Essentials list.

Sourdough Baking Essentials

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