Scallop Waffle-yaki Recipe

Prepare scallops

If using frozen scallops, thaw completely and pat very dry with paper towels. Trim any side muscle if present. Season lightly with 1/4 tsp salt and set on a plate in the fridge while you prepare batter.

Make tempura batter

In a mixing bowl, sift together the all-purpose flour and cornstarch. In a separate bowl, whisk the cold egg lightly, then add the ice-cold sparkling water. Pour the liquid into the flour mixture and stir briefly with chopsticks or a fork — batter should be lumpy and cold. Keep the batter chilled over an ice bath if possible.

Heat oil

In a deep pot or deep fryer, heat vegetable oil to 350°F (175°C). Use a thermometer to maintain temperature. Keep a wire rack ready to drain fried scallops.

Batter and quick fry

Working in small batches, dredge each scallop very lightly in a dusting of flour (helps batter adhere), then dip into the tempura batter, shake off excess, and gently lower into the hot oil. Fry 45–60 seconds until pale golden and just cooked through — scallops cook fast. Remove to a rack to drain. Fry remaining scallops and keep warm in a single layer in a low oven (200°F / 95°C) if needed.

Optional double-fry for extra crisp

If you prefer ultra-crisp texture, let the first fry scallops rest for 2–3 minutes, then return to the oil for an additional 30–45 seconds until crisp and golden. Drain again.

Form waffle-yaki

Preheat a waffle iron or a tabletop takoyaki/mini waffle grill (nonstick). Brush lightly with neutral oil. Working quickly while scallops are warm, place one tempura scallop on the hot waffle surface, close the lid gently for 10–20 seconds to imprint a waffle pattern and warm through. The goal is to lightly compress and warm the tempura batter to get a glossy surface for glazing — do not overcook scallop. Transfer to a clean plate.

Make kabayaki glaze

Combine soy sauce, mirin, sake, sugar, sliced ginger, and smashed garlic in a small saucepan. Bring to a gentle simmer over medium heat and reduce until slightly thickened and glossy, about 6–8 minutes. Taste and adjust balance — it should be sweet-salty and syrupy. Strain out ginger and garlic if desired and keep warm.

Glaze scallops

Place each warmed waffle-tempered tempura scallop on a tray. Using a spoon or a silicone brush, coat the top of each scallop with a thin layer of warm kabayaki glaze. For a more pronounced glaze finish, return scallops briefly to the hot waffle iron (30–45 seconds) or under a broiler for a few seconds to caramelize glaze — watch closely to avoid burning. If using, add the small knob of butter into the glaze just before glazing and stir to emulsify for extra gloss.

Make umami mayo

In a small bowl, whisk together Japanese mayonnaise, white miso paste, and yuzu (or lemon) juice until smooth. Taste and add chili oil if you want a little heat. Adjust consistency with a few drops of water if too thick.

Plate and finish

Place a small dollop (about 1 tsp) of umami mayo on each serving plate or directly alongside each glazed scallop. Set the glazed scallop atop or beside the mayo. Garnish with a pinch of bonito flakes, a sprinkling of toasted sesame seeds, and the thinly sliced scallions. Add a shiso leaf or microgreens for color and freshness.

Optional flourish

For theater, lightly pour 2 tbsp warmed sake or rice wine over the glazed scallops and carefully flambé (optional) just before serving to deepen flavor — exercise caution and keep a lid nearby. Alternatively, spoon a little extra warm kabayaki glaze over the top tableside.

Serve immediately so the tempura remains crisp with the glossy kabayaki finish. Makes an elegant appetizer or small plate. Leftover glazed scallops will lose crispness and should be eaten within a few hours.