Melt the delfia fat (coconut fat) and butter over medium heat in a saucepan. Remove the pan from the heat and add the chocolate, stirring until everything is melted. Stir in the coffee and vanilla sugar.
Cool until the mixture is slightly warmer than room temperature.
Carefully mix in the puffed rice with a spatula. You may need less rice, depending on the consistency of the mixture.
Form small, round balls with two tablespoons and place the balls on a baking sheet. Let the balls harden completely before placing them in a tight cookie tin. You can also keep them in the freezer.