For the chocolate cube, first melt the dark chocolate, spread it evenly on a sheet of baking paper and let it set/harden in a cooled place.
Then cut the solidified chocolate now into 5 x 5 cm squares (16 pieces) and quickly detach from the baking paper. Then cut the chocolate cake (about 2 cm high) into 5 cm squares.
Now heat the apricot jam and brush the sides of the cake squares with it. Carefully press the chocolate plates to each side of the squares. There should be 4 cubes with a bottom of cake.
Chill the cubes for 20 minutes. In the meantime, whip the whipped cream with the maple syrup until stiff and pipe it into the chocolate cubes (on top of the cake).
Finally, place berries or fruit on each whipped cream cup (also covered with chocolate, according to taste).