How I make the teriyaki sauce at work (mind you, I cook for conventions, so we use large quantities):
1 gallon of Kikkoman soy sauce
3 gallons cold water
About 1/2 cup of fresh garlic, minced fine
About 1/2 cup of fresh ginger root, minced fine
About 10 pounds of sugar
Stir until sugar is dissolved.
We keep all that in a 5-gallon bucket in the walk-in cooler, and it’s what we use to marinate the teriyaki chicken overnight. For the glaze, we pour what’s needed into a pot and bring it to a boil on the stove, then slowly stir in a slurry of corn starch and cold water (just a bit at a time), stirring constantly until it reaches the desired thickness. But you have to be careful - add too much corn starch too quickly and you suddenly have a pot of hot teriyaki Jell-O. Mmmmm…
Yep, not sure of specific proportions, but use 50/50 mixture of soy sauce and water as your base. To this add a little bit of rice wine, some garlic, some ginger, and brown sugar till desired sweetness is reached. You can thicken with corn starch if desired.
Seconded. That stuff is fantastic, although it’s not quite the same as teriyaki sauce I can usually find in take-out places. It seems to have more of a soy sauce flavor. But it’s still really good.
I use 50/50 soy sauce and mirin, and brown sugar (and a bit of ginger and garlic-- not strictly authentic but oh well) and then just simmer it to reduce it.
If you’re lazy like me, Soy Vey Veri Veri Teriyaki is the best bottled teriyaki sauce. And it’s OU kosher, too! (Not that it matters to me, but the company’s origin story and name make me giggle. Jewish Boy meets Chinese Girl and yummy marinades ensue.)