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Closeup of umami mayo in a small bowl with dried mushrooms in the background.

Umami Mayo

Course Sauce/Dressing
Prep Time 5 minutes
Total Time 5 minutes
Servings 4 tablespoons (¼ cup)
Author Marissa


  • ¼ cup homemade mayo
  • 1 small piece dried shiitake or porcini mushroom ¼-1/2 inch in size*
  • dash of fish sauce


  • Add the mayo to a small bowl. Set aside.
  • In a spice grinder or mortar and pestle, grind up the dried mushrooms to a fine powder; enough to make ½ a teaspoon.
  • Add the mushroom powder to the mayo.
  • Add a dash of fish sauce.
  • Mix to combine.


*I normally have mushroom powder at the ready by grinding a decent amount at once and keeping it stored in an airtight container. This recipe calls for ½ a teaspoon of mushroom powder.