4οΈβ£ Assemble the Cake: Place one cake layer on a serving plate. Spread a thin layer of buttercream, then pipe a border around the edge. Fill with raspberry filling. Repeat with the second layer. Add the third cake layer and apply a thin crumb coat of buttercream. Chill for 30 minutes.
5οΈβ£ Chocolate Raspberry Ganache: Heat cream and liqueur until simmering. Pour over chopped chocolate and let sit for 2-3 minutes, then stir until smooth. Chill for 30 minutes, then spread over the chilled cake.
6οΈβ£ Garnish & Serve: Decorate with fresh raspberries and mint. Serve immediately or chill for up to 4-6 hours. Store leftovers in the refrigerator.