Check the main blog post for tips and variations. This recipe was originally published in my cookbook, Ever-Green Vietnamese (Ten Speed Press, 2023). Makes 1 generous cup | 270ml
Course: sandwich, sauce
Cuisine: Asian American
Keyword: kewpie, mayonnaise, umami mayonnaise
Ingredients
1large egg,near or at room temperature
1big pinch garlic powder,or 1 small garlic clove, minced and mashed or put through a garlic press
¼teaspoonfine sea salt
¼teaspoonMSG,or ½ teaspoon Asian mushroom seasoning, pounded to a powder
1teaspoonDijon mustard
1 ½teaspoonagave syrup or mild honey
1tablespoonfresh lemon juice or vinegar,distilled white or unfiltered apple cider
1cup| 240ml neutral oil, such as canola or peanut
Instructions
To make with an immersion blender: Put the egg, garlic, salt, MSG, mustard, agave syrup, lemon juice, and oil in a 2-cup container (such as a measuring cup or glass jar) that’s wide enough for the blender to fit into. Insert the blender to the bottom. Blend on high speed to create a creamy, thick emulsion, pulling up the blender as ingredients become incorporated to ensure things are well blended.
To make with a regular blender or food processor: Put the egg, garlic, salt, MSG, mustard, agave syrup, and lemon juice in the blender jar or food processor’s work bowl. Put the lid on and replace the cap with a funnel to minimize splattering; if using a processor simply remove the pusher. Start the machine, and after a creamy yellow mixture forms, 5 to 10 seconds, start pouring the oil through the funnel (or feed tube) in a slow, steady stream as thin as angel hair pasta. Midway through, after things thicken, pour a thicker stream, as wide as spaghetti. After 1 to 2 minutes, all the oil should be incorporated and the mayo should be creamy and spreadable.
Taste and tweak: Taste and, if needed, adjust with extra salt (for savoriness), lemon juice (for tang), or water by the teaspoon (for softer texture). Blend or pulse to incorporate. Transfer the mayonnaise to an airtight container. Wait 30 minutes before using to allow the umami depth to develop. Keeps well in the refrigerator for at least a week.