Traditional yum yum sauce is not keto-friendly. A standard recipe contains granulated sugar, mirin (a sweet rice wine), and ketchup, all of which add carbohydrates that stack up quickly in a condiment you’re likely to use generously. The good news is that both store-bought sugar-free versions and simple homemade swaps can bring the carb count down to 1 gram or less per serving.
What Makes Regular Yum Yum Sauce High in Carbs
Yum yum sauce, the creamy pink condiment served at Japanese steakhouses, starts with a base of mayonnaise. Mayo on its own is practically zero-carb, which is why the sauce seems like it should be keto-safe. The problem is everything else in the bowl.
A typical recipe calls for a full tablespoon of granulated sugar, a tablespoon of mirin, and a tablespoon of ketchup. The sugar alone adds about 12 grams of carbs. Mirin is essentially sweetened rice wine and contributes several more grams per tablespoon. Ketchup brings its own sugar along with the natural carbohydrates from tomato paste (about 3 grams of carbs per tablespoon before the added sugar in most ketchup brands). Rice vinegar, paprika, and garlic powder round out the recipe with negligible carbs, but the three sweet ingredients together push a single batch well beyond what most keto dieters want from a dipping sauce.
Because yum yum sauce is a condiment, it’s easy to underestimate how much you’re eating. A couple of generous spoonfuls at a hibachi restaurant could mean 8 to 12 grams of net carbs before you’ve touched the steak or shrimp on your plate. On a 20-gram daily carb limit, that’s a significant chunk of your budget spent on sauce.
Sugar-Free Store-Bought Options
G Hughes makes a sugar-free yum yum dipping sauce that clocks in at just 1 gram of total carbohydrate per two-tablespoon serving, with zero grams of sugar. It’s marketed specifically as a Japanese steak, chicken, and shrimp sauce and is widely available at grocery stores and online. For a keto dieter who wants the flavor without any kitchen work, this is the most straightforward option.
When shopping for other brands, flip the bottle and check the nutrition label for total carbohydrates, not just “sugars.” Some sauces use ingredients like modified food starch or honey that add carbs without technically being listed as “added sugars” in the way you’d expect. If a serving has 2 grams of total carbs or less, it fits comfortably within a keto framework.
Making Keto Yum Yum Sauce at Home
A homemade version is simple to adapt because the base ingredient, mayonnaise, is already keto-friendly. The only changes you need to make involve the three sweet culprits: sugar, mirin, and ketchup.
- Sugar: Replace granulated sugar with a powdered monkfruit blend or any zero-carb sweetener you prefer. Powdered versions dissolve more easily into a cold sauce than granular ones.
- Mirin: Swap it for a small splash of rice vinegar plus a pinch of your sugar substitute. This mimics mirin’s sweet-tangy flavor without the carbs from rice wine.
- Ketchup: Use a sugar-free ketchup, or substitute a tiny amount of tomato paste with a drop of sweetener. Tomato paste on its own has about 3 grams of carbs per tablespoon, so keep the quantity small.
The rest of the recipe stays identical: butter, rice vinegar, paprika, garlic powder, onion powder, and a little water to thin it out. Mixed together, a keto-adapted batch typically comes in under 1 gram of net carbs per serving. It keeps in the fridge for about a week.
Starting with a quality mayonnaise matters here because it makes up the vast majority of the sauce. Check the label on your mayo, too. Most full-fat mayonnaise has zero or near-zero carbs, but some lighter versions or flavored varieties sneak in sugar. Avocado oil mayo works well and is a popular choice among keto dieters for its cleaner ingredient list.
Ordering Yum Yum Sauce at Restaurants
At a hibachi or Japanese steakhouse, the yum yum sauce will almost certainly be the traditional version made with real sugar and mirin. You won’t find a sugar-free option on the table. If you’re strict about staying in ketosis, your safest move is to skip it or use only a very light dip, keeping it to a teaspoon or so. A small taste won’t knock most people out of ketosis, but freely spooning it over your plate the way most diners do will add meaningful carbs.
Soy sauce, which is typically available at the same restaurants, has roughly 1 gram of carbs per tablespoon and works as a lower-carb alternative for flavoring grilled meats and vegetables. Hot mustard is another option that’s usually carb-free or close to it.