It's an all-natural product that is made from condensing smoke from burning wood. You'll find it in a lot of BBQ sauces, cheeses like smoked Gouda, and lots of other products that are marketed as u0022smokedu0022.u003cbr/u003eu003cbr/u003eIn this recipe, it infuses that fresh-off-the-grill flavor into your burgers, even if you're cooking them on the stove.