Sourdough Discard Pretzel Buns
Soft, chewy, deeply golden, and topped with flaky sea salt — these sourdough discard pretzel buns are the kind of homemade bread that makes people stop mid-bite and ask, “Wait, YOU made these?”
I started making this pretzel bun recipe because I had a jar of sourdough discard sitting in my fridge, silently judging me every time I opened the door. Turns out, it was begging to be turned into the most incredible homemade burger buns I’ve ever tasted.
Table of Contents
Why You’ll Love This Recipe
These sourdough discard pretzel buns hit every note: that satisfying chewy bite, a gorgeous deep-brown crust, and a subtle tang from the discard that sets them apart from any store-bought bun.
They’re also one of the best discard bread ideas out there because you don’t need fed, active starter. Just grab that neglected jar from the back of the fridge and put it to work.
Whether you’re building the ultimate smash burger or loading up a breakfast sandwich, these buns hold everything together without falling apart. Sturdy, flavorful, and honestly kind of show-offy in the best way.
Ingredients You’ll Need
Everything here is pretty pantry-friendly. The baking soda bath is what gives these that classic pretzel flavor and dark crust — don’t skip it.
| Group | Ingredient | Amount |
|---|---|---|
| For the Dough | Warm water | 1 cup + 2 tablespoons |
| Brown sugar | 1 tablespoon | |
| Kosher salt | 2 teaspoons | |
| Active dry yeast | 1 1/4 teaspoons | |
| Sourdough discard (unfed, room temp) | 200g (about 3/4 cup) | |
| All-purpose flour | 4 cups | |
| Unsalted butter, melted | 4 tablespoons | |
| For Boiling | Water | 10 cups |
| Baking soda | 2/3 cup | |
| For Topping | Egg yolk + water (egg wash) | 1 yolk + 1 tablespoon water |
| Flaky sea salt | To taste |
Step-by-Step Instructions
Step 1: Wake Up the Yeast
Add the warm water and brown sugar to the bowl of a stand mixer fitted with the dough hook. Sprinkle the yeast on top and let it sit for about 5 minutes.
You’re looking for it to get foamy and a little bubbly — that’s the yeast saying “I’m alive and ready.” If nothing happens after 10 minutes, your water might have been too hot or your yeast is old. Start fresh.
Step 2: Build the Dough
Add the sourdough discard, flour, and salt to the bowl. Mix on low speed, then pour in the melted butter while the mixer runs. Once everything comes together, bump it up to medium and knead for 4-5 minutes until smooth.
The dough should feel soft and just slightly tacky — not sticky. If it’s clinging to the bowl, add flour one tablespoon at a time. Too dry? A splash of water will sort it out.
No stand mixer? No problem. Knead by hand on a lightly floured surface for about 8-10 minutes. It’s a workout, but also kind of therapeutic.
Step 3: First Rise
Transfer the dough to a large oiled bowl, cover with plastic wrap, and let it rise for 60-90 minutes at room temperature until doubled in size.
This is a great time to check out these chocolate chip overnight oats for tomorrow’s breakfast while you wait. Multitasking, baker-style.
Step 4: Shape the Buns
Line two baking sheets with parchment paper. Turn the dough out onto a clean, dry surface and divide it into 8 equal pieces for larger buns, or 10 for smaller ones.
Cup your palm over each piece and roll it against the surface with a gentle circular motion until you get a smooth ball with a seam on the bottom. Place them on the baking sheets and cover loosely. Let them rest for 20 minutes.
Pro tip: That 20-minute rest isn’t optional — the dough needs to relax before hitting the boiling water. Use the time to prep your baking soda bath.
Step 5: The Baking Soda Bath
Preheat your oven to 425 degrees F. In a large pot, bring 10 cups of water to a boil, then add the baking soda. It’ll bubble up a bit — that’s totally normal.
Drop the buns in 2-3 at a time and boil for 20-30 seconds per side. They should float freely — this is called “passing the float test” and means your dough proofed properly.
A longer boil means a thicker crust. Stick to 20-30 seconds for that classic soft-but-chewy pretzel texture we’re going for in this pretzel bun recipe.
Step 6: Egg Wash, Score, and Bake
Lift the buns out with a slotted spatula, shake off excess water, and place them back on the lined baking sheets. Brush each one with egg wash and sprinkle generously with flaky sea salt.
Score an X or a single line on top of each bun with a sharp knife, bread lame, or scissors. It doesn’t need to be deep — just enough to break the surface so steam can escape during baking.
Bake for 14-16 minutes until deeply golden brown. Think rich amber, not pale gold. That color is where all the flavor is.
Let them cool fully before slicing. Yes, fully. The inside is still setting up as they cool, and cutting in too early gives you a gummy crumb.
Expert Tips, Variations, and Troubleshooting
Tips for the Best Sourdough Discard Pretzel Buns
Use room temperature discard. Cold discard straight from the fridge can interfere with the yeast activation. Set it out for 30-60 minutes before you start.
Don’t skip the baking soda bath. This is what makes these homemade burger buns taste like actual pretzels. The alkaline bath triggers the Maillard reaction, giving you that deep color and chewy, slightly glossy crust.
Score generously. If your buns crack unevenly on the sides, you likely didn’t score deep enough. A proper score guides the expansion and keeps things looking pretty.
Fun Variations to Try
Swap the flaky salt for everything bagel seasoning if you want a flavor-loaded topping. It’s especially good if you’re making these as protein-packed breakfast sandwiches.
Add a tablespoon of caraway seeds or sesame seeds to the dough for extra texture. You can also brush the finished buns with garlic butter right out of the oven for something a little indulgent.
Troubleshooting
Buns didn’t float in the water? They likely under-proofed. Give the shaped buns another 10-15 minutes to rise before boiling. Rushing this step is the most common mistake with this discard bread idea.
Buns are pale after baking? Make sure your baking soda bath is actually boiling (not just simmering) and that you’re boiling each bun for the full 20 seconds per side.
Dough feels too sticky? Add flour one tablespoon at a time during the kneading step. Sourdough discard varies in hydration, so small adjustments are totally normal.
Storage Instructions
| Storage Method | Duration | Notes |
|---|---|---|
| Room temperature (airtight) | Up to 2 days | Best texture within the first day |
| Refrigerator | Up to 5 days | Wrap individually for best results |
| Freezer | Up to 2 months | Freeze fully cooled, in a zip bag |
How to Reheat
To reheat from room temperature, pop the buns in a 350 degree F oven for 5-7 minutes. They’ll crisp right back up like they just came out of the oven.
From frozen, let them thaw on the counter for an hour, then warm in the oven. Avoid the microwave if you can — it makes the crust soft and a little rubbery.
No-Waste Kitchen Ideas
Stale buns? Slice them thin and toast in the oven with olive oil for pretzel croutons. Incredible in soups or on salads.
You can also cube and blend stale buns into breadcrumbs with a little garlic powder and dried herbs. Use them anywhere you’d use panko — on mac and cheese, stuffed mushrooms, or even alongside savory cottage cheese scrambled egg bowls.
Nutritional Information
Based on 8 buns per batch. Values are approximate and will vary based on exact ingredients used.
| Nutrient | Per Bun (1 of 8) |
|---|---|
| Calories | ~295 kcal |
| Carbohydrates | ~50g |
| Protein | ~7g |
| Fat | ~7g |
| Saturated Fat | ~4g |
| Sodium | ~680mg |
| Fiber | ~2g |
Frequently Asked Questions
Can I use fed sourdough starter instead of discard?
Yes, you can use fed starter, but the flavor will be milder. The unfed discard gives these buns a more pronounced tang, which is part of what makes this pretzel bun recipe so good. Either will work from a texture standpoint.
Do I have to use a stand mixer?
Not at all — you can knead the dough by hand on a lightly floured surface for about 8-10 minutes. The dough is smooth and workable, so hand-kneading is totally doable. Just make sure you knead until the dough is soft and no longer sticky.
Can I make the dough ahead of time?
Yes! After the first rise, you can cover the shaped buns tightly and refrigerate them overnight. The next day, let them come to room temperature for 30-45 minutes, then proceed with the boiling and baking steps.
Why is baking soda added to the boiling water?
The baking soda creates an alkaline environment that reacts with the dough’s surface during boiling. This is what gives sourdough discard pretzel buns their signature deep-brown crust, chewy texture, and classic pretzel flavor — it’s not just for looks.
What goes well with these pretzel buns?
They’re perfect as homemade burger buns, but also incredible for pulled pork sandwiches, turkey and brie, or a classic egg and cheese breakfast sandwich. They also pair beautifully with a bowl of soup for dunking.
Give These Sourdough Discard Pretzel Buns a Try
If your sourdough discard has been living rent-free in your fridge, it’s time to give it a purpose. These sourdough discard pretzel buns are chewy, golden, deeply flavorful, and honestly one of the most satisfying bakes you can do on a weekend.
They work as homemade burger buns, breakfast sandwiches, or just warm from the oven with a little butter. Which, honestly, might be the best way to eat them.
If you love using up pantry staples in creative ways, you might also enjoy this dairy-free banana bread — another great way to use what you’ve got.
Made these? Share your results on Pinterest and leave a comment below — I love seeing your bakes and hearing how the recipe went for you!
Sourdough Discard Pretzel Buns
Equipment
- Stand mixer with dough hook
- Large pot
- Slotted spatula
- 2 half-sheet baking trays
- Parchment paper or Silpat mat
- Bread lame, sharp knife, or scissors
- Pastry brush
Ingredients
For the Dough
- 1 cup + 2 tablespoons warm water
- 1 tablespoon brown sugar
- 2 teaspoons kosher salt
- 1 ¼ teaspoons active dry yeast
- 200 grams sourdough discard unfed, at room temperature (about 3/4 cup)
- 4 cups all-purpose flour
- 4 tablespoons unsalted butter melted
For Boiling
- 10 cups water
- ⅔ cup baking soda
For Topping
- 1 egg yolk beaten with 1 tablespoon water for egg wash
- flaky sea salt for topping
Instructions
- Combine the warm water and brown sugar in the bowl of a stand mixer fitted with the dough hook. Sprinkle the yeast on top and let sit for 5 minutes until the yeast begins to foam.
- Add the sourdough discard, flour, and salt and mix on low speed. While the mixer is running, pour in the melted butter and mix until combined. Change to medium speed and knead until a smooth dough forms, about 4-5 minutes. You can also knead by hand if preferred.
- If needed, add more flour or water one tablespoon at a time to reach your desired consistency. The dough should be soft, smooth, and not sticky.
- Transfer the dough to a large, oiled bowl. Cover with plastic wrap and let rise for 60-90 minutes, or until doubled in size.
- Line 2 half-sheet baking trays with parchment paper or a baking mat and set aside.
- Turn the dough onto a smooth, dry surface and divide into 8-10 equal pieces (8 for larger buns, 10 for smaller). Using one palm for friction, roll each piece into a ball with the seam on the bottom. Place the buns on the prepared baking sheets, cover, and let rise for 20 minutes.
- Preheat the oven to 425°F. Add 2/3 cup baking soda to 10 cups of water in a large pot and bring to a boil.
- Place the buns in the boiling water for 20-30 seconds on each side. Boil several at a time, but make sure they have room to float freely. The buns should pass the float test; if they sink, allow more proofing time.
- Remove the buns from the water using a slotted spatula and shake off excess water. Return to the baking sheet. Brush each bun with egg wash and sprinkle with flaky sea salt.
- Use a bread scoring tool, sharp knife, or scissors to score an X or a line on top of each bun. This does not need to be deep — just enough to break the surface to allow steam to escape.
- Bake for 14-16 minutes until a deep, golden brown. Remove from the oven and let cool fully before serving.
