Preheat the oven to 350°F and line a muffin tin with four paper liners.
In a mixing bowl, stir together the red velvet cake mix, buttermilk, vegetable oil, and egg white until smooth.
Divide the batter evenly among the four liners and bake for 18 minutes, or until a toothpick comes out clean.
Remove the cupcakes from the tin and let them cool completely on a wire rack.
Spread a thin layer of cream cheese frosting over each cooled cupcake.
Spoon the melted white chocolate into a piping bag or zip-top bag with one corner snipped off, then pipe thin crisscross lines across the frosting to resemble mummy bandages.
Press two candy eyes into the frosting on each cupcake while the white chocolate is still soft.