This goo is packed with tiny cornstarch grains. Water winds through the narrow gaps between them.
A hard push needs a touching grain path that can carry force from one side of the bowl to the other.
Tap to crowd the grains until their contacts connect.
In the usual thick recipe, a slow push gives grains time to slide. A fast push crowds them into contact.
slowfast
Try the same fist in the same batch. Its shape and contact area stay the same; only push time changes.
Choose a push.
For this modeled batch, keep the same scoop of cornstarch and add one extra cup of water. No punch yet.
The next test keeps the punch just as fast.
This modeled batch: same grains, same fast fist, one extra cup of water.
