The best replacement for cornstarch is flour.

The best alternatives to cornstarch are rated as following:
★★★★★  flour
★★★  arrowroot
★★★  cornmeal
★★  talc
★★  potato starch
★★  baking powder
★  cornflour
★  corn flour
★  tapioca
★  baking soda
★  baby powder
★  corn meal
★  flour for gravy
★  all purpose flour
★  flour thickener
★  corn starch
★  tapioca flour
  flour calories
  talcum powder
  talc baby powder
  flour nutrition
  gelatin
  tapioca starch
  borax
  xanthan gum
  rice flour
  flour to make gravy
  flour to thicken stew
  cornflower
  arrowroot powder
  wheat flour
  flour to thicken soup
  cream of tartar
  masa
  flour gravy
  clear jel
  talc powder

Your alternative for cornstarch is not listed? Suggest!
Speaking about cornstarch, one probably shouldn't forget about fried chicken.

Other search terms related to cornstarch and their ratings are:
★★★★★ fried chicken
★★★★ water recipe
★★★★ flour
★★ glue
★ arrowroot
You have in mind a companion for cornstarch and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cornstarch in all years. Click on graph for more.
cornstarch
flour
arrowroot