Preheat your oven to 350F/175C degrees and line a large cookie sheet with a piece of parchment paper.
Grind 1 cup of the rolled oats in a food processor or a high-speed blender until the oats are a fine, flour-like texture.
Transfer the oat flour to a large bowl and add in all the remaining ingredients. Mix with a spatula or a wooden spoon until everything is well-combined.
Divide the mixture into 12 cookies and bake for 10-12 minutes, or until the cookies are set and lightly golden-brown.
Allow to cool down to room temperature before serving. Enjoy!