01 -
Using a food processor, pulse the cabbage gently in small batches until finely chopped into small squares without pulverizing. Repeat the process for the carrot. Transfer both to a medium mixing bowl.
02 -
In a separate small bowl, combine buttermilk, whole milk, white vinegar, finely chopped onion, mayonnaise, lemon juice, sugar, salt, and black pepper. Whisk thoroughly until smooth and homogeneous.
03 -
Pour the dressing over the cabbage and carrot mixture. Stir thoroughly to coat all ingredients evenly. The initial dryness will resolve as moisture from the cabbage is released.
04 -
Refrigerate the mixture for at least 30 minutes to allow flavors to meld and moisture to develop. Stir well before serving.