Making large batches of syrups and sauces without reducing the majority of what I originally started with? I've recently come across the recipe to make one of my favorite glazes, &quot;Jack Daniels Glaze&quot; from T.G.I. Fridays and am close to perfecting it. The only issue I'm currently facing is that in order to get it to the thick consistency I want, I have to reduce down it to 1/4 of what I started with. For example, I started with 8 cups of water and end up with 2 with my heat on medium high for about an hour. I've tried this on something as simple as a run of the mil pot to my higher end copper core All-Clad sauce pan both yielding the same results. What's the key to making large batches of my sauce? Do I need even more water? Note that I've tried high and low heat. Here are my ingredients:

8 cups water
1 cup teriyaki sauce
2 tablespoons of soy sauce
2 cups of brown sugar
1 lemon
1/4 of a yellow onion
1/4 cup Jack Daniels Whiskey
2 cloves of roasted garlic
1/4 teaspoon cayenne pepper
1 tablesppon of crushed pineapple

Original Recipe: https://hostthetoast.com/jack-daniels-burgers-t-g-i-fridays-copycat-recipe/
Follow the recipe and increase everything by the same proportion if you want to make more instead of just adding more water. You've octupled the water but kept everything else about the same. Of course you'll have to boil off all that extra water before the consistency is correct. If you had a recipe for a gallon of lemonade but wanted two gallons, would you add an extra gallon of water to the original recipe and expect it to taste the same? Or would you add more lemon and sugar in addition to the extra water to keep the flavor the same? Same thing here, adding more water will water it down, you need to increase everything to increase the yield and keep the consistency the same as the original.
Interestingly that page even has a button to scale up the recipe. Click it and you'll see it does exactly what I say here: it doubles or triples all ingredients.