Prepare the cake mix in a 9 X 13 baking pan according to the directions on the box. Cool completely on a wire rack.
Crumble the cake into a large bowl. Add the frosting and mix until well combined.
Line a baking sheet with wax paper. Roll a heaping tablespoon of dough into a 1½-inch ball and place it on the prepared baking sheet. Place in refrigerator until firm, several hours.
Melt chocolate in microwave per directions on package.
Working about 4 balls at a time, dip balls in chocolate using a spoon or a dipping fork and place on prepared baking sheet. Keep the undipped balls in the refrigerator until ready to dip.
Once you have covered all the balls in chocolate, place in the refrigerator until the chocolate coating is set. If desired, drizzle chocolate on the balls for decoration.