Line a baking tray with parchment paper and set aside.
In a large mixing bowl add protein powder, oats and coconut flakes and whisk together with a fork to set aside for later.
In a medium saucepan over medium heat, add milk, butter and sugar
Whisk until combined.
Keep whisking until the butter melts and mixture comes to a boil.
Boil for 1 min and then remove from heat.
Now whisk in a pinch of salt and vanilla extract.
Add the protein powder, oats and coconut into the sugar mixture and mix in until incorporated.
Use a medium (2.5 oz) cookie scoop to scoop out 10 cookies onto the baking tray lined with parchment paper.
Then refrigerate the cookies until firm, about 10 minutes.
Enjoy immediately and store any leftovers in an airtight container in the refrigerator and enjoy up to a week.