Mix together the brown sugar, garlic, ginger, 2½ cups water, honey, and soy sauce in a saucepan over medium-high heat; bring to a boil.
Whisk together the cornstarch and ⅓ cup water in measuring cup or a small bowl; whisk into the sauce mixture and let simmer gently until slightly thickened. Sauce will thicken further as it cools, but as-is it is perfect for a nice saucy stirfry or for tossing with a batch of wings or chicken drumsticks!
Recipe by Hidden Ponies at https://hiddenponies.com/2016/04/homemade-honey-garlic-sauce/