Mix together with a rubber spatula or spoon until most of the flour is incorporated, then use a clean hand to work in the remaining flour until the dough is uniform.
Lightly dust the counter with flour, then roll dough out to 1/8" thick with a floured rolling pin.
Cut treats out with a 2 inch cookie cutter and place on a parchment-lined baking sheet.
Bake for 18 - 20 minutes, or a few minutes longer for crunchier treats.