Start by preheating your oven to 350 F and lining a baking sheet with parchment paper. You may need to lightly grease the tray first, so that the parchment paper sticks to it.
Next, prepare your oat flour if making it from scratch, by processing your rolled oats in a blender or food processor. If you’re using pre-made oat flour, you can skip this step!
Add your oat flour to a bowl alongside the cold butter, baking powder, and brown sugar. Mash it together (note: it will be very crumbly!) then, once fully combined, add the milk and mix until a thick dough forms. If the mixture is still crumbly, you can add in more milk until it reaches the desired consistency.
Finally, add in your chocolate chips.
Using your hands, form your dough into a round, scone shape and place it on your baking sheet.
Sprinkle it with a handful of brown sugar, then bake for 18-20 minutes, until the top reaches a light, golden brown.
Then, remove from the oven, let cool, and enjoy!