Using a 2-in/5-cm cutter, cut 24 rounds from the chocolate sponge.
Using a pastry bag fitted with a #5 plain tip, pipe the chocolate mousse into twenty-four 3-in/8-cm hemispherical flexible silicone molds, filling them two-thirds full.
Using a pastry bag fitted with a #5 plain tip, pipe ½ oz/14 g of the caramel filling into the center of each chocolat