Peachy BBQ Beef Ingredients 3-4 lb chuck roast, trimmed of fat (if needed, cut in half to fit into crock pot)... 2 T butter 1 yellow onion, chopped 1 bottle of your favorite bbq sauce, or your own homemade sauce 4 T apple cider vinegar 1/4 cup peach or apricot preserves 1/4 cup brown sugar