*To make the oat flour I popped 3ish-4 cups of rolled oats into a food processor and blitzed as fine as possible to make the 2 cups needed. Possibly a blender would work but I have not tried this.

Beat margarine and sugar in a bowl, when light and fluffy add vanilla and egg.

Sift the bi-carb and baking powder into the 2 cups of oats and mix a little.

Fold the oat mix into the butter/sugar mix with the cup of chocolate chips until all incorporated. This makes a fairly wet mix.

To make the biscuits you can either use 2 teaspoons to drop small balls of dough onto a baking tray. You may need to round them a little to tidy them up then use a fork to flatten. OR Pop the bowl into the fridge for 15 mins or so to firm up, roll into balls and flatten. I spoon the first tray then pop the bowl into the fridge so it firms for the next tray in etc.

Place on a lined tray to bake in a 160-170*C preheated oven for 12 -15minutes. These biscuits will spread, leave room between them.

The biscuits will be thin and crispy when cooled on a wire rack. Store in an air tight container.