We baste with a vinegar & spice mix with a little oil. Spice is mostly garlic, salt and tabasco. The sauce is just a homebrew I’ve tweaked over the years. Tomato purée base, apple & white vinegar, a little mustard, some Worcestershire, and a top secret blend of spices. I also use a little molasses and Florida Crystals demerara raw cane sugar. One batch is more tart and less sweet, one is more sweet and more pepper, and one is sweet but with very little heat. Something for everybody.