Let the dough sit for 10 minutes. This rest helps the flour soak up the water. After resting, the dough will feel less sticky and easier to knead.
Knead with a stand mixer on low-medium speed for 8–10 minutes, or knead by hand for 12–15 minutes. Bagel dough should feel firm and tight, not soft like sandwich bread. It should look smooth like a balloon and spring back when you press it.
Check the dough feel.
Pinch a small piece and stretch it—if it makes a thin, stretchy “window” without tearing right away, you are close. If it tears quickly, knead 1–2 minutes more. The dough should hold its shape in a ball and not slump.
First rise (bulk fermentation).
Place the dough in a lightly oiled bowl, cover, and let it rise at room temperature until it looks puffy and has grown by about 50–75%. This may take 3–5 hours, depending on room temperature and starter strength. It will feel lighter when you lift it.
For deeper sourdough flavor and easier shaping, cover the bowl and refrigerate the dough for 8–12 hours or overnight. Cold dough is firmer, which makes shaping neat bagels simple. You can skip this if you’re short on time.
Turn the dough onto an unfloured or very lightly floured counter. Cut into 8 equal pieces (use a scale if you have one). Each piece should look like a small puck, about the size of your palm.
Working with one piece at a time, cup your hand over it and drag in small circles on the counter to create surface tension. The ball should look smooth on top with a sealed bottom seam. Repeat for all pieces. Rest 5 minutes.
Use your thumb to poke a hole in the center of a dough ball. Slip two fingers in and spin the dough gently to stretch the hole to about 1.5–2 inches wide. The ring should look even all the way around. Repeat with all pieces.
Place shaped bagels on a parchment-lined baking sheet. Cover loosely and let them proof 45–90 minutes at room temp. They should look slightly puffy and spring back slowly when gently poked. Meanwhile, preheat the oven to 425°F (218°C).
Fill a wide pot with at least 3 inches of water and bring to a gentle boil. Stir in 1 teaspoon baking soda and 1/4 cup coconut sugar. The water should look lightly colored. Reduce heat to a steady simmer—gentle bubbles, not a hard rolling boil.
Drop 2–3 bagels into the simmering water. They should float within seconds. Boil 20–30 seconds per side for a softer crust or 40–45 seconds per side for a chewier crust. Use a slotted spoon to flip and remove them; let water drip off.
Place boiled bagels back on the parchment. Brush with egg wash (or milk) so toppings stick. Sprinkle sesame seeds, poppy seeds, coarse salt, or everything bagel seasoning evenly over the top. Press lightly so seeds grab.
Bake until golden and glossy.
Bake at 425°F for 18–22 minutes, rotating the pan halfway through. Bagels are done when they look deep golden, feel firm on the sides, and sound lightly hollow when tapped. The crust should look shiny and the bottoms should be browned.
Cool bagels on a rack for at least 15 minutes so the crumb sets. Slice and toast for a classic bagel bite. The crumb should look even with small, tight holes and the crust should chew, not crackle.
Store and freeze.
Keep at room temperature in a sealed bag for 2–3 days. For longer storage, slice, then freeze in a freezer bag for up to 3 months. Toast straight from frozen for the best texture.