Spray the inside of both sides of your campfire pie iron generously with nonstick cooking spray.
Butter one side of the first bread slice. Place it butter-side DOWN into the pie iron.
Spread the strawberry pie filling over the bread, leaving a small border around the edges.
Add dollops of whipped cream cheese on top of the pie filling.
Butter one side of the second bread slice. Place it butter-side UP on top of the filling, closing the sandwich.
Close and latch the pie iron shut.
Hold the pie iron over hot coals (not direct flames) and cook for 1 to 1.5 minutes per side, flipping once - about 2 to 3 minutes total.
Carefully open the pie iron and check that the bread is golden-brown on both sides.
Remove the pudgy pie, place on a paper plate, and sprinkle with powdered sugar immediately.
Let cool for about 60 seconds before eating - filling will be very hot!