I'm going to hang my comment here! Your corn starch statement made a perfect hook, but there are a lot of gravy comments I don't understand in this thread.
I don't get why people would use flavour packets when making gravy, or why people would use corn starch.
Not saying it's wrong, but that it seems unneeded.
For example, let's say I fry up a pork chop. I may put 1/2 a spanish onion in the pan, and I'd definitely add some cayane pepper and mustard powder. Maybe some fresh garlic.
As the cooking nears completion, I'll add flour over everything, until all the juices and grease is absorbed.
At this point I want to brown the flour a little bit. My heat is little below medium, I want browned, not burned.
So, I try to flatten the flour against the cooking surface, spread it out, make sure it gets heat.
This takes maybe 4 minutes, with me making sure the flour gets moved around, re-flattened, mixed up a bit, so it all browns.
When ready, add in cold water. The amount is try-till-you-learn amount. If it starts out too thick, add more! Now set pan to full heat, and stir repeatedly.
When the water is hard boiling, keep stirring, making sure that during this entire process you are cleaning the bottom of the pan.
If you're using nonstick, instead of stainless or iron, you probably can't do this right. You need to scrape the pan here. You need to forcefully agitate. Right tool, right job.
You may need to turn the heat down a bit, as things thicken. Again, you need to start thin, make thick.
(When you first add the cold water, it will be very water like. Thin. But what happens is the flour breaks up, and makes it thick, so first timers will need a lot more water than they think.)
Two things will happen here. You will collect all the flavour from everything you have just cooked, and the gravy will start to thicken on its own.
No corn starch is required, or flavour packet. Full, lush, flavourful, thick gravy, no lumps, cold water is part of this, and the hard boil after.
It will take a few tries to get it right, but once learned, all things become gravy.
Note: thanks for lettimg me hang my comment here. Also hi.