Brussels is a surprisingly good city for eating keto, with one obvious problem: frites come with everything. Once you make peace with asking for a salad instead, you’re mostly fine.
Brasseries are your friend
The classic Brussels brasserie is built for keto without knowing it. Steak, grilled fish, mussels, salads with proper toppings — the protein options are solid and portions are generous. The trick is the side dish. Frites are the default answer to everything here, but almost every brasserie will swap them for a salad or vegetables if you ask. Some will look at you like you’ve said something offensive. Ask anyway.
Avoid the stoofvlees (beef stew) if it’s made with beer, which it usually is — it’s delicious but adds up. Waterzooi with chicken is worth checking the base on; the cream-based version is fine, the broth-heavy one usually is too.
Turkish and Mediterranean places
Ixelles and Saint-Gilles are full of them, and they’re consistently keto-friendly. A lamb or chicken kebab without the bread, a mixed grill plate, grilled fish — straightforward. The meze spreads can be hit or miss depending on what’s in the dips, but hummus in moderation is not going to derail anything.
The Châtelain area
The restaurants around Place du Châtelain lean toward the kind of food that photographs well and is often lighter on carbs by default — lots of bowl-style places, grilled proteins, places that actually label allergens and ingredients. It’s a good area to wander if you’re not sure where to go.
What to actually watch out for
The sauces are the hidden problem in Brussels. Américaine sauce, sauce Béarnaise, these are usually fine. But the house sauce at a random brasserie could be anything. Same with salad dressings — a lot of places use commercial dressings loaded with sugar. Asking for olive oil and vinegar on the side is never a bad call.
Alcohol is its own topic, but the Belgian beer situation is difficult. Most Belgian beers are high-carb. Stick to dry wine or spirits if you’re drinking — there are worse cities to be limited to a gin and tonic.
Practically speaking
Most restaurants here are used to dietary requests. French-speaking staff may be less familiar with “keto” as a term than with “sans glucides” or just explaining what you’re avoiding. It rarely takes more than a sentence.
The real challenge isn’t finding food — it’s the smell of gaufres de Liège from every market stall. That one you’re on your own.