Enjoy cookie as a slice of cake.
Preheat the oven to 180 C/ 350 F. Lightly grease an 8 inch round pan with oil or cooking spray.
Gluten free flour absorb moisture quickly so don't delay baking when the dough is ready.
Baking time may vary, adjust accordingly.
Don't be tempted to remove the cake from the pan when still hot as there is a lot of butter in the cookie cake and would crumble. Let it cool completely. It is hard to resist, I know but you are strong!
Frosting is totally optional.