Sōka Senbei (草加せんべい, soy-glazed rice crackers)

Ingredients

Equipment Needed

• •Steamer lined with a damp cotton cloth or perforated parchment
• •Surikogi (wooden pestle), or a sturdy bowl and rolling pin
• •Rolling pin and parchment
• •Wire rack
• •Charcoal konro with wire grill rack, or a toaster oven or broiler

Instructions

1. 1

   Mix the tare

   Combine the shōyu with the mirin and sugar, if using, in a small pan. Warm just until the sugar dissolves and the mirin loses its raw edge, then cool. If you're using shōyu alone, warm it gently and cool it again; a thin, even glaze brushes cleanly. This is tare, a seasoning sauce, not syrup.

   For the leanest Sōka taste, use only shōyu. The mirin and sugar are a home-kitchen help for shine, not permission to make candy.
2. 2

   Form the dough

   Put the jōshinko and salt in a heatproof bowl. Pour in the boiling water a little at a time, stirring with chopsticks or a wooden spoon until no dry flour remains. When it's cool enough to touch, knead it into a firm, smooth dough. Hot water starts the rice starch swelling, so the dough binds instead of crumbling.

   Jōshinko is the right flour because senbei are made from ordinary uruchi rice. Mochiko and shiratamako are glutinous rice flours; they make a different family of crackers.
3. 3

   Steam the dough

   Break the dough into rough walnut-size pieces and set them on a damp cloth in a steamer. Steam over steady heat for 22 to 25 minutes, until the pieces smell sweet and feel tacky and cooked through. You cook the starch now because raw rice flour baked later stays chalky in the center, no matter how brown the outside looks.

4. 4

   Pound it smooth

   While the dough is still hot, gather the pieces into a sturdy bowl. Wet a surikogi, a wooden pestle, or a rolling pin, then pound and knead for 6 to 8 minutes, wetting your hands only when the dough sticks. Stop when it looks smooth and slightly elastic. This isn't mochi; you're smoothing the rice so the crackers dry evenly and crack cleanly.

5. 5

   Press the rounds

   Divide the dough into 16 pieces. Press each piece between parchment into a 7 to 8 cm round, about 3 mm thick. Keep the middle no thicker than the edges. Thick middles stay tough, thin edges scorch first, and evenness is kinder than prettiness.

   A flat-bottomed plate or tortilla press lined with parchment makes even rounds. A rolling pin is enough if you turn the dough as you press.
6. 6

   Dry them fully

   Set the rounds on a wire rack. Dry in a 95°C/200°F oven for 1 hour 30 minutes to 2 hours, flipping halfway, until they are matte, pale, and firm with no cool damp feel at the center. Or dry them uncovered in the refrigerator overnight, then give them 30 minutes in the low oven before grilling. Drying is the detail that decides Sōka senbei: too much water and the grill makes toughness, not crispness.

   Traditional makers use sun and air. At home, a low oven or dehydrator gives the same control without asking the weather to behave.
7. 7

   Grill until crisp

   Heat a charcoal konro or grill to medium, or heat an oven to 180°C/350°F. Grill the dried rounds over charcoal, turning often, or bake them for 10 to 12 minutes, flipping once, until pale beige with toasted freckles and a dry, crisp sound when tapped. Constant turning keeps one patch from burning before the center has crisped.

8. 8

   Brush and set

   Brush both sides very lightly with tare, return to the heat for 30 to 45 seconds per side, and repeat once. Thin coats set as a soy-dark shine and keep the cracker crisp. A generous coat sounds kind and behaves badly, softening the rice and scorching at the edges.

9. 9

   Cool and store

   Cool the senbei on a rack until the glaze is dry to the touch and the crackers sound crisp when tapped. Don't seal them warm; trapped moisture dulls the bite. Eat the same day for the cleanest fragrance, or store airtight once fully cool.

Chef Tips

• •Buy jōshinko, not mochiko or shiratamako. Sōka senbei is made from non-glutinous uruchi rice; glutinous flour gives chew and puff, which belongs to another cracker.
• •The drying decides the bite. If a round feels cool or damp at the center, give it more time before grilling. Fire can crisp a dry cracker, but it can't rescue a wet one.
• •Use a charcoal konro if you have it, with a simple wire grill rack. A toaster oven or broiler is a sensible stand-in, provided you turn or move the crackers often.
• •Keep the tare thin. Sōka style is soy first, rice first, nothing hidden under sweetness.

Advance Preparation

• •The shaped rounds can be dried uncovered in the refrigerator overnight, then finished for 30 minutes in a 95°C/200°F oven before grilling. This is the best make-ahead point.
• •The shōyu tare keeps one week refrigerated. Bring it to room temperature before brushing so it goes on thin.
• •Finished senbei keep five days in an airtight tin once fully cool. If they soften, re-crisp them in a 140°C/275°F oven for 5 minutes and cool again before closing the tin.

Frequently Asked Questions

Nutrition Information

1 serving (about 21g)