Homemade Mayonnaise Cost Calculator

See exactly how much your homemade mayo costs vs. name brands.

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Frequently Asked Questions

How much oil do I need for one batch of homemade mayo?
Most recipes use 1 cup (8 oz) of neutral oil per egg yolk. This yields approximately 1 to 1.25 cups of finished mayonnaise. Olive oil produces a more assertive flavor; avocado or sunflower oil are neutral choices preferred for classic mayo.
How long does homemade mayo last in the fridge?
Homemade mayo lasts 5 to 7 days in the refrigerator, stored in a sealed jar. It does not contain the preservatives used in commercial mayo, so use it within a week. The egg yolk is the limiting factor — always use fresh, high-quality eggs.
Can I use a whole egg instead of just the yolk?
Yes. Whole-egg mayo is slightly looser and more stable than yolk-only recipes. The flavor is milder. This is the method used by immersion blender recipes that process the entire egg in under 30 seconds. The cost difference is negligible — you use the same fraction of one egg either way.
Why did my homemade mayo break (separate into oil and liquid)?
Broken emulsions happen when oil is added too quickly or the ingredients are too cold. Fix a broken batch by starting fresh with a new yolk in a bowl, then slowly whisking the broken mayo into the fresh yolk a few tablespoons at a time to re-emulsify.
Is Primal Kitchen mayo worth the price premium?
Primal Kitchen mayo is made with avocado oil and contains no soybean oil, canola, or added sugars, which appeals to paleo and Whole30 eaters. At $9–$12 for a 12 oz jar, it is significantly more expensive than both conventional mayo and homemade avocado oil mayo. Homemade avocado oil mayo typically costs $2–$4 per cup, depending on your avocado oil price.

Is Homemade Mayo Cheaper Than Hellmanns or Dukes?

Mayonnaise is one of those condiments that rewards a little extra effort in the kitchen — and the cost comparison is genuinely interesting. Because the recipe is almost entirely oil and one egg yolk, the price per cup depends almost entirely on what you pay for a quart of neutral oil.

The Recipe and Its Costs

A standard batch of homemade mayonnaise uses one egg yolk, one cup (8 oz) of neutral oil, one teaspoon of Dijon mustard, the juice of about one-third of a lemon, and a pinch of salt. This yields approximately one cup of finished mayo. With eggs at $5/dozen and avocado oil at $9/quart, a batch costs about $2.75. With neutral oil at $6/quart, it drops to roughly $1.80.

Oil selection matters most: Avocado oil is the most popular choice for homemade mayo but costs 50–80% more than regular vegetable or sunflower oil. Sunflower or light olive oil are the most economical options that still produce a neutral-flavored result.

Comparison to Store Brands

A 30 oz jar of Hellmann's runs $5–$7 at most grocery stores — about $1.30 to $1.90 per cup. Duke's lands in a similar range. Primal Kitchen avocado oil mayo in a 12 oz jar runs $9–$12 — roughly $6–$8 per cup, which is almost always more expensive than making your own with avocado oil.

The takeaway: homemade mayo with a neutral oil like sunflower or vegetable oil is typically cheaper than Hellmann's or Duke's. Homemade with avocado oil is cheaper than Primal Kitchen but costs more than conventional brands.