Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.

Unroll the crescent roll dough and separate it into triangles.
Using a knife or pizza cutter, cut each triangle into thin strips (about 1/2 inch wide).

Take one hot dog and wrap it with the strips of crescent roll dough, leaving a small gap at the top for the "eyes." The wrapping should resemble the bandages of a mummy.
Place the wrapped hot dog on the prepared baking sheet. Repeat with the remaining hot dogs.

Using a pastry brush, lightly brush the wrapped hot dogs with the beaten egg. This will give them a nice golden color when baked.

Bake in the preheated oven for 12-15 minutes, or until the dough is golden brown and cooked through.

Remove the Mummy Hot Dogs from the oven and let them cool slightly. Use small dots of mustard or ketchup to create eyes on the exposed part of the hot dogs.

Serve warm with your favorite dipping sauces, such as ketchup or mustard, and enjoy your spooky Mummy Hot Dogs!