Original recipe. Indoor easy, outdoor delicious. Where there's smoke, there's flavor! An all natural hickory smoke flavor enhancer for any type of food. 1869: first smokehouse built in Mexia, TX. Colgin is the all-natural liquid smoke with no additives or preservatives. Colgin is vegan, contains no animal byproducts and is gluten free. Colgin is the instant answer for adding smoke flavor to almost any food that would benefit from real smoke flavor and aroma. Create a gourmet flavored dish with just a few shakes! Indoor oven, outdoor grill! Cooking sauce for easy oven barbecuing and charcoal broiling.