Chewy, dense, and perfectly crusty — these sourdough bagels rival any bagel shop. The overnight ferment adds incredible depth of flavor.

Combine starter, water, and brown sugar in a large bowl. Add flour and salt, then mix until a stiff dough forms.
Knead for 10-12 minutes until the dough is smooth, firm, and passes the windowpane test. This dough should be stiffer than bread dough.
Cover and let rest at room temperature for 1-2 hours with a few stretch and folds.
Divide dough into 8 equal pieces (about 110g each). Shape each into a tight ball.
Poke your thumb through the center of each ball. Gently stretch the hole to about 2 inches in diameter. The hole will shrink during proofing.
Place shaped bagels on a parchment-lined baking sheet. Cover tightly and refrigerate overnight (8-14 hours).
The next day, preheat oven to 425°F (220°C). Bring the boiling water, honey, and baking soda to a rolling boil.
Working in batches of 2-3, drop bagels into the boiling water. Boil for 45 seconds per side.
Remove with a slotted spoon, shake off excess water, and place back on the parchment-lined baking sheet.
Immediately sprinkle with your desired toppings while still wet.
Bake for 20-25 minutes until deep golden brown, rotating the pan halfway through.
Let cool on a wire rack for at least 15 minutes before slicing.