Yes, cornstarch is an excellent thickener for stews. Always thicken your stew at the end of the cooking time. Make a slurry consisting of 2 - 3 tablespoons of cornstarch in 100ml of water. Mix it well until the cornstarch is completely mixed in with the water and contains no lumps.
Start stirring the stew with one hand and pour the slurry slowly in with the other. Don't pour it in all at once. Try half the mixture and then give it a few seconds of stirring before you proceed with more. Go cautiously with the last half, stirring between small additions of the slurry, and stop when the stew is thickened to your liking. This way, your stew will always be thickened to perfection.
You can actually buy potato flour from grocery stores and supermarkets, which would seem more appropriate for the purpose, but probably if you feel your brand of instant potatoes is too thin, you should first check to be certain you are following the instructions correctly and, if you're doing all the right things and the potato is still too thin, try another brand. You shouldn't have to thicken instant potatoes.
Corn starch can be used in food, like to thicken gravy. Laundry starch has chemicals added.
Corn starch thickens cheese sauce. Basic flour will do it also.
corn or potatoes
Yes. I have had problems when trying to use old corn starch as a thickener.
Rice, potatoes, and corn all have lots of starch.
Many foods have starch but some that are highest in starch content are potatoes and corn.
Gummy bears, corn, bread, and potatoes.
In general cornstarch is used to thicken liquids and can be replaced with flour, arrowroot, potato starch, tapioca, coconut flour and even instant mashed potato granules. For frying, flour, salt and pepper is a decent substitute for cornstarch.
I suppose you could but flour or corn starch will work much better.
A mixture of equal parts water and cornstarch used in cooking to thicken sauces.
It becomes a colloidal suspension with the corn starch suspended in fhe meduium if water.
Potatoes and Corn starch :D