Soak halved jalapeños in ice water for 15–20 minutes to tame heat a bit. Pat dry after soaking.
Preheat oven to 400 degrees and line a baking sheet with parchment paper.
In a medium bowl, mix cream cheese, shredded cheddar, garlic powder, and salt. Put mixture in a Ziplock bag and snip a corner (you can also use a pastry bag or just spoon it in if you prefer).
Pipe cream cheese filling into each jalapeño half, slightly mounded but not overflowing.
Slice puff pastry or crescent roll dough into ¼" strips. Stretch gently and wrap a couple strips around each stuffed jalapeño, overlapping like bandages and leaving a small gap for the eyes near the top. Tuck ends underneath.
Brush pastry lightly with egg wash.
Bake jalapeño poppers for 16-20 minutes, until puff pastry is turning golden and cream cheese filling is bubbling. You can put under the broiler for the last couple minutes if you want.
Press eyes into cream cheese and serve.