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1
In a 10-inch skillet, whisk water and flour over medium heat until paste becomes a thick lump, about 2 minutes. Scrape onto a plate, spread into a 1-inch layer, cover, and cool until it reaches about 75u00b0F (23u00b0C) on an instant-read thermometer, about 30 minutes.
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2
Pulse bread flour, whole wheat flour, sugar, cinnamon, salt, and instant yeast in a food processor fitted with a metal blade. Once ingredients are combined, add cooled yukone and water. (If using active dry yeast, first dissolve with the water.) Process until dough is smooth, about 90 seconds. Turn dough onto a clean, un-floured surface and knead in raisins; it will seem an impossible task at first, but keep at it. Divide dough into 8 roughly equal portions (3 3/4 ounces or 105g each).
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3
Cup a portion of dough beneath your palm and work in quick, circular motions to form a tight skin around the ball, with only a tiny seam along the bottom. If seam is large or irregular, continue rounding until bottom is nearly smooth. Cover with plastic and let rest 15 minutes. Poke a hole into the center of each portion with a damp fingertip, then gently stretch into a 3-inch ring, wetting your hands in cold water as needed to prevent sticking. Arrange on a well-greased, parchment-lined half sheet pan, then cover with plastic and refrigerate 24 to 36 hours, depending on your schedule.
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4
Adjust oven rack to lower-middle position and preheat oven to 425u00b0F (218u00b0C). Fill a stainless steel pot with about 3 inches of water, stir in barley malt (if using), and bring to a boil over high heat. Meanwhile, line a baking sheet or cutting board with a thick layer of paper towels. Working with 2 or 3 bagels at a time, boil bagels, about 30 seconds per side. Place on paper towels, then immediately transfer to a parchment-lined half sheet pan. (If left on paper towels too long, bagels will stick; if this happens, quickly dip bagel back into hot water, and the wet paper towel will peel right off.)
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5
Bake bagels until glossy and golden brown, about 25 minutes. Let cool at least 15 minutes. To serve, split horizontally with a serrated knife. Unsliced bagels can be stored up to 48 hours in a paper bag (or loosely wrapped in parchment), then sliced and briefly toasted to serve.
