Is mayonnaise kosher?
Usually yes — most commercial mayonnaise can be kosher — but it’s precisely the kind of egg-and-oil product where you should look for the symbol rather than assume.
Why it's not that simple
The core recipe is friendly to kashrus; the details are where to look:
- Mayonnaise is oil, eggs, and vinegar or lemon — ingredients that are usually fine, which is why many mayos carry a reliable hechsher and are pareve.
- But the details matter: eggs are checked for blood spots in production, the oil’s source and processing need review, and “natural flavors,” stabilizers, and shared equipment can carry issues.
- Vinegar and flavorings can occasionally derive from wine or other sensitive sources, and some specialty mayos add dairy or non-kosher flavor bases.
- So mayonnaise is a “look for the hechsher” product: often kosher, easy to confirm, not worth assuming.
The only reliable way to know a specific product is kosher is a trusted kosher symbol on the package. Learn the designations — D (dairy) and Pareve (no meat or dairy) — and never rely on the ingredient panel, the brand’s reputation, or the name on the front. When you’re unsure about a product or a symbol you don’t recognize, ask your rav.
And it can change
A brand may certify most flavors but not all — check the label on the one you’re buying.
Choose a mayonnaise with a reliable symbol, and note whether it’s pareve if that matters to your meal.
Mayo and dressings are staples in kosher kitchens — certification, and a clear pareve status, widens your market immediately.
Educational only — not a halachic ruling. Kosher status depends on the specific product and its certification, and can change. Verify the symbol and consult your rav. Reviewed by the Pure K rabbinic staff.