Preheat the oven to 350 degrees F. Line a 8x8-inch baking dish with parchment paper and/or spray with nonstick cooking spray.

For the Brownies: In a medium-sized bowl, add the protein powder, flour, cocoa powder, sweetener, and baking powder. Stir dry ingredients until they are mixed well. Then add the pumpkin, butter, milk and melted chocolate. Using a hand mixer, mix to combine. Pour the batter into the prepared dish.

Bake for 18-20 minutes, or until a toothpick inserted in the center comes out mostly clean. Let cool completely before adding frosting!

For the Cookies and Cream Frosting: In a medium-size bowl, whisk milk and pudding for about a minute. Gently fold in the cool whip. Then, fold in the crushed Oreo crumbles.

Spoon and spread evenly on cooled cake. Sprinkle with remaining Oreo crumbles. For best taste, texture, and for easier slicing, refrigerate for at least an hour to set before serving.