Preheat oven to 450 degrees F.Line a cookie sheet with parchment paper.Wash cauliflower and break into bite sized floretsMix milk and vinegar together and set asideMix all dry batter ingredients in a large bowlPour in milk and stir thoroughly to make a thick batterDip each floret into batter and ensure they are evenly coatedPlace on cookie sheet and repeat until all the florets are coatedBake for 15 minutes or until golden brownRemove from oven and using tongs, carefully dip each floret in BBQ sauce.Return to cookie sheet and bake for an additional 5-10 minutes