I remember when I was child, my mom always made this for me. Even though she made it without rum, it tasted so good and that was really my sweet moment. In Germany it called ‘Rumkugeln‘, in Bahasa Indonesia called Bola coklat. There are many recipes of Rum balls. You could make it with any filling you like, like desiccated coconut, ground or chopped almond / cashew nuts etc.
This is my recipe that I’ve always made: