In the bowl of a stand mixer fitted with a dough hook, combine the flour, salt, sugar, and yeast. Add the barley malt syrup and water. Mix on medium-low speed for 12-15 minutes, until a stiff, smooth dough forms.
845 gram high-gluten flour*, 1 tablespoon + 1 teaspoon Diamond Crystal salt, 1 tablespoon sugar, 2 ¼ teaspoon instant yeast, 2 tablespoon barley malt syrup, 2 ¼ cup water
Perform the windowpane test: Pinch off a small piece of dough. Stretch it until a thin windowpane forms without tearing. Continue mixing until it passes the test, if needed.
Shape the dough into a ball, place it in a bowl, and cover it with a plate or plastic wrap. Chill for at least 12 hours and up to 24 hours.
Line two baking sheets with parchment paper, and lightly dust them with flour. Fill a small, shallow bowl with flour.
Remove the dough from the bowl. Use a bench scraper to cut the dough into 12 equal portions, about 115 grams each.
Form each portion into a ball, leaving the smooth skin exposed. With the smooth side of the ball against the palm of your hand, roll each ball against a clean surface in a circular motion to seal the bottom. If the dough doesn’t stick and seal, add a few drops of water to the clean surface to help the dough stick. Lightly dip the bottom of each ball of dough into the flour in the shallow bowl. Place six balls on each prepared baking sheet.
Lightly cover the dough with plastic wrap, and proof in a warm, dry place for one and a half hours, or until the dough has increased in size by 50%. Then, refrigerate the dough for one hour, allowing it to firm up.
Poke a hole through the center of each dough ball and gently stretch to form a three-inch opening.
Bring a large pot of water to a rolling boil, and add barley malt syrup. Preheat the oven to 425°F (218°C).
water, 1 tablespoon barley malt syrup
Working in batches, boil the bagels 30-45 seconds per side. Transfer the bagels back to the baking sheets. Add the everything bagel seasoning to taste while the bagels are still wet.
everything bagel seasoning
Transfer the bagels to the oven, and bake 14-18 minutes or until deeply golden brown and shiny, rotating the pans once. Transfer the baked bagels to wire racks to cool completely.