Add the liquid ingredients. Add the honey, water, hoisin sauce, and soy sauce to a high-speed blender.
Add the dry ingredients. Next, add the salt, five-spice powder, garlic, and cornstarch.
Blend until smooth. Blend on high speed for 20-30 seconds or until the garlic is fully blended into the liquid.
Heat until thickened. Once blended, transfer to a saucepan and heat over medium heat, whisking constantly, until the sauce thickens. At first, the sauce will have a light brown color but will darken as it cooks.
Let cool. Remove the saucepan from the heat and let the sauce cool for a few minutes before transferring to a clean jar. The sauce is now ready to use!
This char siu sauce can be stored in the refrigerator for up to 2 weeks.
