for 1 cup
- 1 large pasteurized egg, room temperature
- 1 teaspoon dry mustard powder
- 1 tablespoon distilled white vinegar
- 1 cup neutral oil (240 mL), such as canola or vegetable
- 1 tablespoon lemon juice
- 1 teaspoon kosher salt
- In a food processor, combine the egg, mustard powder, and vinegar. Puree for 1 minute, until pale yellow.
- With the processor running, very slowly start to add the oil, 1 tablespoon at a time. Once you’ve added half of the oil, add the rest in a slow, steady stream. The mayonnaise should begin to thicken to the consistency of prepared mayo, or a bit looser. Add the lemon juice and salt and pulse to incorporate.
- Transfer to a clean, airtight container and store in the refrigerator. The mayonnaise should keep for up to 1 week.
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