Break up your leftover orange cake and place the pieces into a medium mixing bowl
Add the Cointreau and squeeze the mixture together until it forms clumps. If using a store bought cake, it may be drier -add a little more Cointreau if needed
Roll into balls by scooping out the mixture, using a melon baller or a medium-sized ice cream scoop, roughly the size of a tablespoon. Roll each scoop in the palms of your hands until its a smooth ball
Place the balls onto a small lined tray and pop them into the freezer for 10 minutes (this makes them easier to dip into the chocolate)After 10 minutes, heat the chocolate for dipping. I personally like to temper my chocolate in the microwave, for short bursts until it starts to melt, then stir it and stir it until it’s completely melted. Start with 30 seconds, stir, then heat in 10 second bursts, stirring for a good 10 seconds in between. This will heat up your chocolate and cool it down (tempering), which results in a nice hard chocolate shell.
Place a small baking sheet aside and line it with some parchment paper
Dip the first cake ball into the melted chocolate, remove with a fork, giving it a little tap on the side of the bowl to shake off chocolate drips, then place onto the lined tray
Once you’ve dipped 2-3 balls, quickly grate some zest over them before the chocolate sets, then repeat with the remaining cake balls
Place in the refrigerator , where you can store them in an airtight container for 1 week