Step 1

Add the aquafaba, lemon, vinegar, syrup, salt, and dry mustard into a tall container. With an immersion blender, blend to combine. Alternatively, use an upright high-speed blender, and blend on low to medium speed.

Step 2

While blending, slowly stream in the oil (a tablespoon or two at a time) until it thickens into a white, creamy mayo. (I usually use 3/4 cup plus 2 tablespoons of oil, but you might need anywhere from 3/4 to 1 cup.)

Step 3

Store leftovers in an airtight container or jar in the fridge for up to 2 weeks.