1. Preheat the oven to 180c and line a tray with baking paper.
  2. In a saucepan, gently melt the coconut oil, peanut butter and sweetener together over low heat. Stir through the vanilla extract.
  3. Combine the oats and protein powder and toss these together.
  4. Pour the dry ingredients into the wet mixture and fold everything together so that all of the oats are completely coated.
  5. Transfer this onto your baking tray and firmly press down.
  6. Bake in the oven for 15-20 minutes, or until golden, then remove and allow to cool completely before breaking into clusters.
  7. Store in an airtight jar or container.