In a small bowl, combine the BBQ sauce, vinegar, salt, and pepper. Mix with a fork to incorporate ingredients together.
3 tablespoons barbecue sauce, 1 tablespoon apple cider vinegar, pinch of salt, 1/4 teaspoon pepper
While whisking, slowly drizzle the oil into the other ingredients so that the oil is mixed in and emulsified while you stir. Pour slowly enough that the oil doesn't pool in the dressing.
1/3 cup olive oil
Taste and adjust seasonings as needed. Serve immediately.
If you have any leftovers, store in a sealed container in the fridge for up to two weeks.