Start by lining a 9x9 inch baking pan with parchment paper.
In a large mixing bowl, combine the peanut butter, honey, and vanilla extract. Stir until smooth.
Add in the oats, protein powder, and flaky sea salt. Mix until fully incorporated.
Fold in the chocolate chips and M&Ms until evenly distributed.
Transfer the mixture to the prepared baking pan and press firmly into an even layer.
Chill in the refrigerator for at least 30 minutes to set.
Remove from the pan, cut into squares, sprinkle with sea salt, and serve.
