Slice the jalapeños: Cut each jalapeño in half lengthwise and carefully scoop out the seeds and white membrane with a small spoon or knife. This step reduces the heat level significantly while creating the perfect pocket for your filling.
Pat dry: Use a paper towel to gently dry the inside of each jalapeño half, which helps the cream cheese filling adhere better and prevents excess moisture during baking.
Combine cheeses: In a small bowl, mix the softened cream cheese with the shredded pepper jack cheese until smooth and well blended, about 1 minute of stirring.
Season: Add a pinch of salt and garlic powder, stirring until evenly distributed throughout the mixture.
Fill the jalapeños: Spoon or pipe the cheese mixture generously into each jalapeño half, filling them completely and creating a slight dome on top.
Unroll the crescent dough: Carefully separate your crescent roll dough and gently unroll it on a clean work surface.
Cut bandage strips: Tear small, thin strips from the crescent dough, varying the widths slightly so your mummies look authentically "wrapped."
Wrap the jalapeños: Place each cheese-filled jalapeño half on a baking sheet and drape the dough strips across it in a crisscross pattern, leaving a small space at the top for the face.
Brush with egg wash: Using a pastry brush or your fingertips, lightly coat each wrapped jalapeño with the beaten egg, which will give the crescent dough a beautiful golden-brown finish.
Preheat and bake: Bake at 375°F for 12 to 15 minutes until the crescent dough is golden brown and slightly crispy on the edges.
Cool slightly: Remove from the oven and let cool for 2 to 3 minutes so the cheese filling sets slightly and the mummies are easier to handle.
Add the eyes: Once cooled, carefully place two candy eyes in the unwrapped face area of each mummy using a dab of cream cheese or icing as "glue."