Does Mayonnaise Have Dairy?

Common dairy foods include milk, cheese, and yogurt. People with lactose intolerance must avoid these. This definition helps us answer our main question.

Does Mayonnaise Have Dairy?

The answer is no. Traditional mayonnaise has no dairy. It is lactose-free. This makes it safe for people with lactose intolerance.
Lactose only comes from milk. Mayo's main ingredients are not milk-based. Its creamy texture comes from oil and egg yolks. It does not come from dairy. Plain mayonnaise contains no lactose or dairy.

What’s in Mayonnaise?

Mayonnaise uses simple ingredients. None are dairy. The base is oil and egg yolks. Egg yolks act as an emulsifier. They bind oil and liquids together. This creates a smooth texture. Without them, the mixture would separate.
Acidic ingredients like vinegar are added. They provide a tangy flavor. They also help stabilize the mix. Seasonings like salt and mustard are included. Flavored mayo may have extra items. But the base is always dairy-free. Always check labels on flavored types.

What Nutrients Are in Mayonnaise?

Mayonnaise is high in fat. But it also offers some nutrients. Most fat in mayo is unsaturated. This is especially true with vegetable or olive oil. Unsaturated fat is healthier. It contains a little protein from egg yolks. It also has vitamins like A, E, and K.

People sometimes ask how much mayo equals one egg. Mayo is not a direct substitute. But for protein, about 2–3 tablespoons match one egg yolk. Remember, mayo has more fat. It is not a perfect swap for healthy cooking.

Homemade vs. Store-Bought Mayonnaise

Mayonnaise comes in two main types. These are homemade and store-bought. They differ in ingredients, texture, and shelf life.
Homemade Mayonnaise
Homemade mayo is simple and fresh. You use egg yolks, oil, and vinegar. It has no preservatives. You can adjust flavors as you like. You can add herbs like dill. But making it takes effort. You must slowly add oil to egg yolks. Whisking constantly is key. A blender can help. It also spoils quickly. It lasts only 1–2 weeks in the fridge.

Store-Bought Mayonnaise
Store-bought mayo is convenient. It lasts a long time. It uses the same basic ingredients. But it often has preservatives and stabilizers. These keep the emulsion stable. They also extend shelf life.Mayonnaise filling machine mix and package it evenly. This ensures consistency and safety. Unopened, it can last for months. Once opened, you must refrigerate it. It stays good for 1–3 months in the fridge.

How Long Does Mayonnaise Last?

Shelf life depends on the type and storage.
Homemade mayo is perishable. Keep it in an airtight container in the fridge. It lasts 1–2 weeks. If the smell or color changes, throw it away.
Store-bought mayo lasts longer. Unopened, it stays good for 6–12 months. After opening, refrigerate it. It will last 1–3 months. Always follow label instructions. Do not leave mayo out for more than 2 hours. Heat can promote bacteria. Use a clean spoon each time.

Gather your ingredients. You need one egg yolk, one cup of oil, and one tablespoon of vinegar. Also use mustard, salt, and optional sugar.
Whisk the egg yolk, mustard, salt, and sugar. Slowly drizzle in the oil. Start with one tablespoon. Whisk constantly. The mixture will thicken. Once thick, you can add oil faster. After all the oil is added, stir in the vinegar. Adjust seasonings to taste. If it is too thick, add a little water.
Put the mayo in an airtight container. Refrigerate it for 30 minutes before use. Use it on sandwiches or as a dip.

Mayonnaise Storage Tips

People often ask: does mayo need refrigeration? It depends.
Homemade mayo must always be refrigerated. It has no preservatives. Never leave it out. Store it in an airtight container.
Store-bought mayo is shelf-stable until opened. Unopened, it does not need refrigeration. Once opened, you must refrigerate it. Opened mayo spoils if left out. Keep mayo away from strong odors. Do not freeze it. Freezing ruins its texture. If mayo smells sour or looks watery, discard it.