how many grams in a cup of mayonnaise?

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things people ask

• How much mayo do I need for a big bowl of potato salad?
  Most home recipes use 3/4 to 1 cup of mayonnaise per 2 pounds of cooked potatoes — roughly 170 to 226 g. A full cup gives you the creamy, dressing-forward style; 3/4 cup leaves the potato flavor more forward. Macaroni salad runs similar ratios per pound of dry pasta. Dress while the starch is still warm so it absorbs evenly.
• Why does the chocolate cake recipe call for a whole cup of mayonnaise?
  Mayonnaise is essentially oil, egg yolk, and a little acid — the same fat-and-emulsifier package that butter-and-egg creaming provides. One cup (226 g) replaces both the butter and the eggs in the original 1930s Hellmann's formula, giving an extremely tender crumb. The vinegar also reacts gently with cocoa, deepening color. You won't taste the mayo.
• Does mayonnaise pack down in the cup?
  Slightly. Because mayo is an emulsion of oil droplets suspended in water, scooping forces out small air pockets and can add 5 to 10 g over a spooned-and-leveled cup. For deviled-egg fillings or dressings where the ratio of mayo to mustard or vinegar drives the flavor, level the top with a knife rather than rounding it.

related conversions

• Mayonnaise: tablespoons to grams
• Mayonnaise: teaspoons to grams
• Mayonnaise guide