In a mixing bowl, combine Cool Whip with PB Fit or protein powder. Stir until smooth and well blended.
In a separate microwave-safe bowl, add chocolate chips and butter (or coconut oil). Microwave in 15-20 second intervals, stirring in between, until fully melted.
Line a tray with parchment paper. Arrange a layer of graham crackers on the tray.
Drizzle the melted chocolate over the top.
Spread the protein Cool Whip mixture evenly over the graham crackers.
Place another layer of graham crackers on top to form sandwiches.
Transfer the tray to the freezer and let the sandwiches set until the Cool Whip is firm.
Once frozen, enjoy your homemade protein ice cream sandwiches!