Using a hand mixer and a large bowl, cream together the softened butter, maple syrup. Then beat in the egg and vanilla extract.

Add in the all-purpose flour, oat flour, baking powder, and salt. Mix until combined.

Shape the dough into a disc. Wrap with plastic wrap and place in the fridge to chill for 30 minutes.

After the dough has chilled, preheat the oven to 350°F.

Remove the dough to a clean and floured surface. Roll out the dough very thinly to between ⅛th and ¼ inch. You can also roll the dough out between two pieces of parchment to prevent sticking.

Cut out shapes with cookie cutters and place on a parchment lined baking sheet.

Bake for 10 - 12 minutes.

Remove the baking sheets from the oven and turn the oven off.

Wait 10 minutes.

Turn the oven back on to 225°F and bake for another 10-12 minutes, or until the cookies just start to turn golden on the bottom.