Combine oats and protein powder in a medium sized mixing bowl. Stir until there's a nice dusting of protein powder over all the oats.
Place almond milk, peanut butter, banana or maple syrup, cocoa powder and sea salt in a saucepan and cook over medium-low heat, stirring often until cocoa powder is completely dissolved and the sauce has thickened. Take the pan off the heat and stir in vanilla.
Pour peanut butter chocolate mixture over oats/protein powder and mix until all pieces of the oatmeal are covered.
Place batter in the fridge for 10 minutes to let the batter set up – this step is optional, but the cookies will be cool and much easier to shape if you do it.
Drop chilled dough by spoonfuls on a baking sheet lined with parchment paper, using hands to work cookies into desired shape – I made these into little round cookies.
At this point they're ready to enjoy or you can place them in the fridge if you're serving them later. Store any leftover cookies in the refrigerator for 1 week or in the freezer for longer storage.
Notes
Peanut butter: You can also use almond butter or any other nut/seed butter in place of the peanut butter.
Storage: Store these cookies in an airtight container in your refrigerator for up to 1 week. These also freeze well if you need to keep them longer. Store cookies in an airtight container in the freezer for up to 3 months.