For the basic mixture, crumble the cake base very finely with your fingers and knead well with egg liqueur. Divide the crumb mixture into 2 portions.
For the chocolate pralines, divide chocolate into pieces and melt in a hot water bath. Let it cool down a little. Knead with cocoa and 1 portion of base mass. Form approx. 40 balls (approx. 1.5 cm Ø) from the mixture. Chill for about 1 hour.
For the pineapple pralines, chop the pineapple very finely. Knead with jam and 1 portion of basic mixture. Form approx. 40 balls (approx. 1.5 cm Ø) from the mixture. Chill for about 30 minutes.
Coarsely chop white and dark chocolate separately and melt in a hot water bath. Leave to cool slightly. Dip pineapple pralines individually (e.g. with a fork) into the white chocolate coating, chocolate pralines into the dark chocolate coating and place on baking paper. Leave to dry in a cool place for about 3 hours.