Start by preheating your oven to 350°F.
Mix the flour, oats, and cinnamon together in a large bowl.
In the middle of the dry ingredients, make a well. Pour into that your water, oil, and egg.
Mix this well and form it into a ball. If it’s too dry, add a little bit more water slowly.
Flour your working surface and roll out the dough to a 1/4 in thickness using a rolling pin.
You can cut out your treats in whatever shape you want using cookie cutters or a knife.
Place the biscuits 1 inch apart on an ungreased cookie sheet for baking.
The biscuits need to bake from 20 to 25 minutes.
When they’re finished baking, leave them in the oven for 2 hours to allow them to fully harden.