This homemade Korean BBQ sauce packs layers of deep umami of flavor. It's savory, sweet, spicy, and a little tangy, and is perfect for marinades, sauces, and more!
3. Lower the heat and slowly pour the cornstarch slurry into the sauce, stirring constantly until thickened and the sauce coats the back of a spoon. Remove the sauce from the heat and add the green onions and stir.