Start by lining a 9x9-inch baking pan with parchment paper, leaving some overhang on the sides.
In a large mixing bowl, combine the creamy natural peanut butter, honey, and pure vanilla extract. Stir until smooth.
Add the old fashioned oats, vanilla protein powder, and flaky sea salt to the wet mixture. Mix until fully incorporated.
Gently fold in the semi-sweet chocolate chips, coconut oil, and M&Ms until evenly distributed.
Transfer the mixture into the prepared baking pan. Press it down firmly and evenly with a spatula.
Sprinkle a pinch of flaky sea salt on top for a sweet and salty combination.
Chill the pan in the refrigerator for at least 1 hour to allow the bars to set.
Once firm, lift the bars out of the pan using the parchment paper overhang and slice into squares.
