3 Ways to Use Liquid Smoke - wikiHow 11.04.2021 · Mix up a quick barbecue sauce. Stir 2 teaspoons (10 ml) of liquid smoke into every 1 cup (240 g) of prepared barbecue sauce for an instant smoky flavor. To make your own barbecue sauce, sauté 3 diced onions with 3 cloves of minced garlic until they're tender.