Prepare your chocolate cake mix according to the box instructions and bake it in a 9x13-inch pan. Once it's done, let it cool completely at room temperature, since a warm cake will turn the next steps into a sticky mess.
Break the cooled cake into small crumbs in a large bowl, discarding any hard or crusty edge pieces. Add the frosting a little at a time and mix until the texture resembles thick, moldable dough that holds together when pressed.
Use a cookie scoop to portion the mixture into roughly 1-inch balls, then roll each one smooth between your palms. Set them on a parchment-lined baking sheet as you go so they're ready for the freezer.
Pop the tray of cake balls into the freezer for about 15 minutes to firm up, but don't leave them much longer or they'll get too hard to dip. Dip the tip of each lollipop stick into a little melted white chocolate first, then insert it halfway into each ball for a secure hold.
Melt your white chocolate in the microwave in 30-second bursts, stirring between each, until it's completely smooth. Dip each cake pop fully into the chocolate, let the excess drip off, then add two candy eyes and drizzle extra chocolate back and forth to create the mummy wrap effect.