Preheat the oven to 450°F.
In a large bowl, mix together water, pancake mix, and mashed potatoes until a dough forms.
Knead dough for about 5 minutes.
Divide dough into the desired number of chips.
On a lightly floured surface (use pancake mix), roll dough out until slightly see through, about 1⁄16".
Place dough pieces onto a greased baking sheet. Sprinkle it with sea salt(optional).
Bake for 10 to 12 minutes, flipping chips mid-way through bake time.