Easy Okonomiyaki Chaffles: A Japanese-Inspired Keto Treat

Breakfast

October 30, 2026

Keto Okonomiyaki Chaffle Recipe – vegetarian recipe

Keto okonomiyaki chaffle recipe swaps the usual flour batter for mozzarella, egg, and finely shredded cabbage, then loads it with the classic toppings. Bonito flakes, aonori, beni shoga, and Kewpie mayo go over the top with a tangy sugar-free okonomiyaki sauce. Serve it while the bonito flakes are still dancing.

Imagine the savory, umami-packed flavors of Japanese Okonomiyaki fused with the crispy, cheesy goodness of a keto chaffle. This isn’t a dream; it’s your new favorite low-carb meal! Our Okonomiyaki Chaffle recipe is incredibly easy, lightning-fast, and delivers that authentic street food experience without the carbs. Get ready to fire up that waffle maker for a taste of Osaka, keto-style!

Ingredients

• For the Chaffle Batter
• Shredded Mozzarella Cheese – ½ cup or 56g (1.98 oz)
• Large Eggs – 2
• Baking Powder – ½ teaspoon or 2g (0.07 oz)
• Finely Shredded Cabbage – ¼ cup or 25g (0.88 oz)
• For the Okonomiyaki Sauce
• Soy Sauce or Tamari – 4 teaspoons or 20ml (0.7 fl oz)
• Sugar-Free Ketchup – 4 tablespoons or 60g
• Worcestershire Sauce – 4 teaspoons or 20ml (0.7 fl oz)
• Monkfruit or Swerve Sweetener – 2 tablespoons or 24g (0.85 oz)
• For the Toppings
• Bonito Flakes (Katsuobushi) – 4 tablespoons or 8g (0.28 oz)
• Kewpie Mayonnaise – 2 tablespoons or 30g (1.06 oz)
• Aonori (Green Seaweed Powder) – 2 tablespoons or 10g (0.35 oz)
• Beni Shoga (Pickled Red Ginger) – 2 tablespoons or 30g (1.06 oz)
• Green Onion – 1 stalk, thinly sliced

Instructions

1. Preparation Method
2. Prepare the Okonomiyaki Sauce: In a small bowl, whisk together the soy sauce, sugar-free ketchup, Worcestershire sauce, and sweetener until smooth. Set aside.
3. Preheat Your Waffle Maker: Turn on your waffle maker to preheat. Once hot, lightly grease it with your preferred oil or cooking spray.
4. Make the Chaffle Batter: In a medium bowl, beat the two eggs until well-combined.
5. Combine : Stir the finely shredded cabbage, baking powder, and shredded mozzarella cheese into the beaten eggs. Mix until everything is evenly incorporated.
6. Cook the Chaffles: Pour half of the batter onto the preheated waffle maker plate. Close the lid and cook for 3-4 minutes, or until golden brown and crisp. Repeat with the remaining batter.
7. Assemble and Garnish: Place the hot chaffles on a serving plate. Drizzle generously with the prepared Okonomiyaki sauce and Kewpie mayonnaise.
8. Add Final Toppings: Sprinkle with Aonori, a generous amount of bonito flakes, thinly sliced green onions, and a pinch of Beni Shoga.
9. Serve Immediately: Enjoy your Okonomiyaki Chaffles while they are hot and the bonito flakes are ‘dancing’!

Nutritional Information

• Prep Time: 10 minutesCook Time: 4 minutesServings: 2 Chaffles
• Approximate values per serving (1 chaffle):Calories: 350 kcalNet Carbs: 6gProtein: 20gFat: 28g (0.99 oz)
• Disclaimer: is an estimate and may vary based on the specific brands and used.

Pro Tips

• For an extra crispy chaffle, gently squeeze any excess moisture out of the shredded cabbage with a paper towel before adding it to the batter.
• Do not overfill your waffle maker. The batter will expand as it cooks, and overfilling can lead to a messy cleanup.
• To boost the umami flavor, add a pinch of dashi powder or a teaspoon of nutritional yeast to the chaffle batter.

FAQ

Q: How do I make my Okonomiyaki Chaffle extra crispy
A: For the crispiest result, the key is to remove excess moisture. Gently squeeze the shredded cabbage with a paper towel before adding it to the batter. This prevents the chaffle from becoming soggy and ensures a perfectly crisp texture.

Q: Is this recipe gluten-free
A: Yes, this recipe is naturally gluten-free. To ensure it meets your dietary needs, use Tamari instead of soy sauce and double-check that your brand of Worcestershire sauce is certified gluten-free.

Q: What can I substitute for bonito flakes
A: Bonito flakes provide a unique smoky and savory flavor. If you can’t find them or prefer not to use them, you can simply omit them. For a different savory kick, you could try a sprinkle of nutritional yeast or crumbled crispy bacon.

Q: Can I make these chaffles ahead of time
A: These Okonomiyaki Chaffles are best served immediately for optimal crispness and to see the bonito flakes ‘dance’. If you need to reheat them, we recommend using a toaster oven or an air fryer for a few minutes to restore their crispy texture.

Pro Tips

  • Whisk the sauce first — soy sauce, sugar-free ketchup, Worcestershire sauce, and monkfruit sweetener — and set it aside while the chaffles cook so the flavors settle.
  • Shred the cabbage finely so it softens in the 3-4 minutes the chaffle spends on the iron.
  • Use tamari instead of soy sauce if you want the whole plate gluten-free without any change in flavor.
  • Do not overfill the waffle maker; the egg batter expands as it cooks and overflowing makes a messy cleanup.
  • Assemble and serve immediately — the bonito flakes should be dancing from the heat of the chaffle when it reaches the table.

Frequently Asked Questions

Is okonomiyaki chaffle keto-friendly?

Yes — each chaffle has 6 g of carbs with 20 g of protein and 28 g of fat, and the sauce is made with sugar-free ketchup and monkfruit sweetener instead of sugar.

What is okonomiyaki, exactly?

It is a Japanese savory pancake, and here the batter is mozzarella, egg, baking powder, and finely shredded cabbage — cooked crisp in a waffle maker and finished with the traditional toppings.

Can I make the okonomiyaki sauce ahead?

Yes — whisk the soy sauce, ketchup, Worcestershire, and sweetener together and refrigerate. It tastes even better after the flavors have had a day to meld.

Why did my chaffle come out soft?

It was likely undercooked or overfilled. Use half the batter per chaffle and cook 3-4 minutes until golden and crisp before topping it.

Recipe card below.

More Recipes You’ll Love

Keto Okonomiyaki Chaffle Recipe – vegetarian recipe
Stav Kogan

Keto Okonomiyaki Chaffle Recipe

Discover the ultimate keto fusion: a savory, umami-packed Japanese Okonomiyaki combined with a crispy, cheesy chaffle. This easy, low-carb recipe brings the authentic taste of Osaka street food to your kitchen in minutes.
Prep Time 10 minutes
Cook Time 4 minutes
Total Time 14 minutes
Servings: 2 Chaffle
Calories: 350

Ingredients
  

  • 1/2 cup (56g / 1.98 oz) Shredded Mozzarella Cheese
  • 2 Large Eggs
  • 1/2 teaspoon (2g / 0.07 oz) Baking Powder
  • 1/4 cup (25g / 0.88 oz) Finely Shredded Cabbage
  • 4 teaspoons (20ml / 0.7 fl oz) Soy Sauce or Tamari
  • 4 tablespoons (60g / 2.12 oz) Sugar-Free Ketchup
  • 4 teaspoons (20ml / 0.7 fl oz) Worcestershire Sauce
  • 2 tablespoons (24g / 0.85 oz) Monkfruit or Swerve Sweetener
  • 4 tablespoons (8g / 0.28 oz) Bonito Flakes (Katsuobushi)
  • 2 tablespoons (30g / 1.06 oz) Kewpie Mayonnaise
  • 2 tablespoons (10g / 0.35 oz) Aonori (Green Seaweed Powder)
  • 2 tablespoons (30g / 1.06 oz) Beni Shoga (Pickled Red Ginger)
  • 1 stalk Green Onion, thinly sliced

Method
 

  1. Preparation Method
  2. Prepare the Okonomiyaki Sauce: In a small bowl, whisk together the soy sauce, sugar-free ketchup, Worcestershire sauce, and sweetener until smooth.
  3. Set aside.
  4. Preheat Your Waffle Maker: Turn on your waffle maker to preheat.
  5. Once hot, lightly grease it with your preferred oil or cooking spray.
  6. Make the Chaffle Batter: In a medium bowl, beat the two eggs until well-combined.
  7. Combine : Stir the finely shredded cabbage, baking powder, and shredded mozzarella cheese into the beaten eggs.
  8. Mix until everything is evenly incorporated.
  9. Cook the Chaffles: Pour half of the batter onto the preheated waffle maker plate. Close the lid and cook for 3-4 minutes, or until golden brown and crisp.
  10. Repeat with the remaining batter.
  11. Assemble and Garnish: Place the hot chaffles on a serving plate.
  12. Drizzle generously with the prepared Okonomiyaki sauce and Kewpie mayonnaise.
  13. Add Final Toppings: Sprinkle with Aonori, a generous amount of bonito flakes, thinly sliced green onions, and a pinch of Beni Shoga.
  14. Serve Immediately: Enjoy your Okonomiyaki Chaffles while they are hot and the bonito flakes are 'dancing'!
  15. Do not overfill your waffle maker. The batter will expand as it cooks, and overfilling can lead to a messy cleanup.

Nutrition

Calories: 350kcalCarbohydrates: 6gProtein: 20gFat: 28g

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