Preheat oven to 425°. Whisk together the flour, squid ink powder, salt, sugar, and the garlic and onion powders. Add water and oil and mix until just combined. Add a ½ tsp more water if its too dry but take care not to over work the dough.
Turn out onto a lightly floured surface and roll out the dough to about ⅛ inch thickness, Cut out bat shapes with your mini bat cookie cutter and place them on a parchment lined cookie sheet.
Use a tooth pick to poke holes for eyes. Sprinkle with additional salt if desired and bake for 12-15 minutes.
Continue to roll out and cut out bats, taking care to not work the dough too much. Let the dough rest a while if you find that your bats shrink up too much after cutting.