Sourdough Bagel Recipe: Chewy, Boiled, Overnight

Boiling gives bagels their distinctive surface texture. The hot-water bath gelatinizes starch at the exterior and partly sets the outside before baking; it does not create a completely impermeable seal. Sourdough fermentation adds another variable: the flavor of an active culture containing yeasts and lactic acid bacteria.

This recipe combines a firm levain with a shaped overnight proof. The ingredient weights below are the site’s formula; it has not been independently kitchen-tested for this article. Use the estimated timings to plan, then follow the dough. Levain preparation comes before the evening mix, so the project can span two or three calendar days depending on when you feed it.

What Sourdough Changes

Sourdough cultures produce organic acids and other fermentation compounds. Their effect depends on the culture, flour, feeding schedule, temperature, and fermentation. A sourdough bagel can be mildly flavored or distinctly tangy; a stiff levain does not guarantee a particular acid balance.

Commercial-yeast bagels can also use preferments and overnight refrigeration to develop flavor. Both methods can produce a dense, chewy crumb. Flour strength, water content, dough development, proofing, boiling, and baking all matter; sourdough is not automatically chewier or more flavorful.

Some sourdough processes delay mold growth. That does not establish a five- or six-day keeping time for this recipe. A controlled bread study found that antifungal performance depended on acid concentration, pH, and moisture. Its results are not a home-bagel shelf-life test, and mold resistance is a different question from how quickly the crumb becomes firm.

For the fundamentals, see our beginner sourdough guide and sourdough vs. yeast comparison.

Build the Firm Levain

Use an established, active starter that has been maintained at 100% hydration by weight: equal weights of flour and water. Keep some starter aside before making this build, because the entire levain goes into the dough.

The seed starter contributes 12.5 g flour and 12.5 g water. This makes the levain 72.5 / 112.5 = 64.4% hydration, even though the fresh feed alone is 60%. It is still a firm levain. A seed starter maintained at a different hydration changes the calculation.

Mix to a cohesive dough, cover so it does not dry out, and ferment until expanded and aerated. A 10–12-hour rest around 65–70°F is a starting estimate. Look at the actual rise and interior bubbles; a domed or cracked surface alone cannot prove readiness. If it is still dense, allow more time and assess starter vigor instead of proceeding on the clock.

Using a firm culture can change fermentation, but the results depend on the organisms and maintenance conditions. Research comparing firm and liquid sourdough propagation found changes in both the cultures and their metabolites; it does not justify a universal “firm equals sharp, liquid equals mild” rule.

See our sourdough feeding schedule if the starter needs consistent feedings before it can raise dough reliably.

Ingredients and Equipment

Yield: eight bagels, 122 g dough each before boiling and baking.

Including the levain, total flour is 612.5 g, flour-and-water hydration is 337.5 / 612.5 = 55.1%, salt is 1.80%, and prefermented flour is 18.4%. This hydration convention excludes the small amount of water in the malt syrup. The dough totals 976 g before toppings and processing losses.

Choose a bread flour suitable for a strong, chewy dough. This low hydration produces a firm consistency, but flour absorption varies. Do not correct every bit of tackiness with extra flour or assume that higher water alone determines the final crumb.

Barley malt syrup contributes malty sweetness. For this formula, use the non-diastatic product. Diastatic malt contains active, not living, enzymes and is sometimes deliberately used in bagel recipes. Excess can produce gumminess, so it is not a gram-for-gram substitute here. King Arthur’s malt guide explains the different roles. If needed, 15 g honey or brown sugar can replace the syrup as a sweetener, with a change in flavor and a small difference in water content.

For the boiling bath:

• 4 US quarts water, about 3.8 liters
• 2 tablespoons barley malt syrup or honey
• Optional: 1 teaspoon baking soda, which raises pH and encourages browning

Use a large pot with ample headroom for displacement and foaming, a spider or slotted spoon, a scale, covered proofing trays, baking sheets, and parchment rated for your baking temperature. A suitable stand mixer can help, but hand-kneading is a valid option.

Method

1. Mix and Knead

Tear the ripe levain into pieces and mix with the final-mix flour, water, malt syrup, and salt until no dry flour remains. Knead until the dough becomes cohesive, smooth, and elastic. Firm bagel dough still needs gluten development; stiffness by itself is not proof that it is adequately kneaded.

By hand, work on a clean surface, using a covered rest if the dough resists or tears. Resume when it relaxes. Expect effort, but do not force stretches through tearing dough.

With a mixer, follow its specific dough-hook speed, capacity, and time limits. KitchenAid advises speed 2 for bread dough, with reduced batch size if heavy dough overloads the machine. Do not increase to medium speed to push through stalling, overheating, or unusual noise. Stop and follow the manual; finish by hand if appropriate. Turn off and unplug before touching the hook or inspecting moving parts.

Water temperature should suit your flour, starter, room, and mixing method. An initial dough temperature around 75–78°F is a useful planning target for this schedule, not a requirement that the water itself always be 78–80°F.

2. Bulk Ferment

Cover and let the dough ferment around 75–78°F. Start checking after 1.5–2 hours, but expect that a naturally leavened stiff dough may need longer. Look for noticeable expansion, roughly 30–40% as an initial target for this formula, and a less dense, aerated feel. The dough should not be weak or collapsing.

One fold around 45 minutes is optional if it helps the dough come together. A well-developed stiff dough may not need it. Do not force a tight dough to stretch or treat the fold as a required yeast-redistribution step.

3. Divide and Shape

Divide into eight 122 g pieces. Round each into a smooth, snug ball without tearing its surface. Cover and rest about 5–10 minutes, or longer if needed to relax.

For the poke-through method, push a lightly floured finger through the center and gently widen the hole to roughly 2 inches. The hole may contract as the dough relaxes and expands.

Alternatively, roll a piece into a rope long enough to wrap around your hand with an overlap, then roll the joint firmly against the work surface to seal it. The exact length depends on the size of your hand and bagel. A sound seam matters more than a fixed nine-inch rope.

Place the rings on parchment lightly prepared to prevent sticking, such as with a little flour or fine cornmeal. Leave space between them. Cover without pressing the cover onto the dough.

4. Refrigerate Overnight

Refrigerate at 40°F (4°C) or below, checked with a refrigerator thermometer. An 8–14-hour overnight rest is the starting plan for this formula, not a guaranteed proofing window.

Cold slows fermentation; it does not stop gas production immediately or eliminate overproofing. A warm tray cools gradually, and both culture vigor and refrigerator performance vary. Acetic acid production is not a separate refrigerator stage that continues independently after yeast stops.

Chilling firms the dough and can make transfer into the bath easier. It is still important to have enough fermentation before boiling. For more, see our cold fermentation guide.

5. Check Readiness

The next morning, assess the rings before boiling. They should show some expansion and feel a little puffy while holding their shape. If they remain very tight and dense, give them additional covered time at room temperature, checking again after roughly 30 minutes. Avoid leaving them until fragile or dramatically inflated.

A float test on one ring can be a supporting clue: buoyancy reflects the dough’s density and trapped gas. It is not a validated ten-second rule for the whole batch, and overproofed dough may float too. The starter float-test experiment from King Arthur also demonstrates why floating alone does not establish optimum fermentation.

6. Boil and Top

Preheat the oven to 450°F (232°C). Bring the bath to a boil, then maintain a steady boil without so much turbulence that it knocks the bagels around. Add the optional baking soda carefully; hot liquid can foam.

Lower two or three rings at a time into the bath with a suitable utensil. Leave room for expansion and handle them gently. Start with 60 seconds per side, flipping once, then lift out and drain before transferring to the prepared sheet.

Boiling duration is a texture choice within a recipe, not a single correct number. King Arthur’s bagel tests discuss shorter and longer boils, and its sourdough bagel recipe uses 30 seconds per side. A shorter bath can give a thinner crust; a longer one tends toward more chew. If your first batch has an overly thick skin, test a shorter bath next time.

The bath sets the exterior before baking and affects expansion. Malt is a traditional flavoring, but shine is not evidence that syrup was used: Maurizio Leo’s side-by-side bagel trials did not find added syrup necessary for shine.

Apply toppings while the drained surface remains damp. Sesame, poppy seeds, everything seasoning, coarse salt, or dried onion flakes all work. Fine salt dissolves more readily and distributes differently; coarse salt can dissolve too. There is no universal 30-second topping deadline.

7. Bake and Cool

Bake for about 18–22 minutes, rotating the sheet if your oven browns unevenly. Extend the bake as needed until the tops and sides are well colored and firm and the crumb is baked through. Shield toppings if they brown too fast. Crust color depends on the bath and sweetener, so paleness alone does not prove raw dough, and dark color alone does not prove a fully baked center.

A probe can provide an extra check, but 200–205°F is not a universal bagel endpoint. King Arthur’s different sourdough formula specifies about 210°F. Loaf size, recipe, altitude, and the location of the probe all affect interpretation; combine temperature with the bake and the cooled crumb.

Transfer to a rack and let cool enough to slice without compressing the crumb; allow at least 15–20 minutes as a starting estimate, longer if needed. Cool fully before wrapping for storage.

Troubleshooting

Flat or deflated after boiling: check overproofing, rough transfer, sticking to the tray, and insufficient dough development. King Arthur’s tests identify overproofing as a reason bagels collapse in the bath. Do not automatically narrow the hole or shorten every proof.

Wrinkled surface: review preshaping tension, proofing, handling, and bath length. A tight, smooth preshape can help. Wrinkles do not establish underproofing, and giving every wrinkled batch more fermentation can make overproofing worse.

Tough, thick crust: try a shorter boil or adjust the bake, changing one variable at a time. Sixty seconds per side is this method’s starting point, not a boundary between proper gelatinization and failure.

Unexpectedly airy or bread-like crumb: review fermentation, flour, dough development, and boiling as well as water quantity. Verify the scale and levain hydration before changing the recipe.

Very little tang: mild sourdough is a normal outcome. Record levain maturity and fermentation conditions if you want to explore flavor. Do not deliberately let dough weaken simply to chase sourness.

Toppings fall off or scorch: top while damp and press gently; reduce excess topping and shield from over-browning during the bake. Dry onion and garlic are particularly easy to scorch.

Storing the Bagels

Bagels are at their best fresh. Once fully cool, wrap what you expect to eat over the next day or two; slice and freeze the rest promptly. The freezer is a better choice than relying on a week-long counter-storage promise. Toast the frozen halves directly if your toaster can accommodate them safely.

Refrigerating plain bread usually firms the crumb faster, which is a quality trade-off rather than a universal prohibition. Bagels with perishable fillings such as cream cheese need appropriate refrigeration; the plain-bagel storage advice does not apply to them.

Discard moldy bagels rather than cutting off visible spots. USDA advises discarding moldy bread and baked goods because contamination can extend below the surface.

If your starter also makes country bread, this is another way to use a ripe build. For commercial-yeast methods, see our homemade bagels guide. Use a dedicated sourdough discard recipe for unfed starter rather than adding an arbitrary teaspoon of yeast to this formula and retaining its overnight schedule.