Prevent your screen from going dark
Makes about 1 1/2 cups 1x
Whisk together the buttermilk and buttermilk flour until no lumps remain. Whisk in the mayonnaise and soy sauce (or whatever flavorings you want). Taste and add salt and pepper if you like. Transfer to an airtight container and refrigerate; it will thicken a little as it chills. Eat within 7 to 10 days, depending on whether you put fresh herbs or juice in there.
— Recipe adapted from How to Cook Everything Twentieth Anniversary Edition