Mayonnaise, often colloquially referred to as mayo, is a thick, creamy dressing or sauce often used in sandwich spreads, dips, salads, and numerous other culinary applications. It is predominantly white in color and has a smooth, velvety texture. The primary ingredients in mayonnaise are egg yolks, oil, vinegar, and lemon juice, although many variations and additional flavors can be added. The specific ratio and method of combining these ingredients results in an emulsion, where tiny droplets of one liquid are evenly dispersed throughout another. This process, along with the lecithin from the egg yolks, gives mayonnaise its unique texture and consistency. It has a rich, mild, and slightly tangy taste, with the lemon juice and vinegar providing a light acidic note that balances the richness of the oil and egg yolks.

Mayonnaise can typically be found in the condiment aisle of a grocery store. It's often near the ketchup, mustard, and salad dressings. If you can't find it, ask a store employee for assistance.