Ganache layer: Pour the chocolate milk into a small saucepan and sprinkle with the gelatin. Allow the gelatin to soak for a minute or two. Heat mixture over low heat, stirring constantly, until gelatin is fully dissolved, about 5minutes. Remove from the heat and allow to cool slightly. Stir in chocolate liqueur. Pour mixture into loaf pan and chill until fully set, one to two hours. Prepare Martini layer.

Martini layer, pour the milk into a medium saucepan and sprinkle with gelatin. Allow the gelatin to soak for a minute or two. Heat over low heat, stirring constantly, until gelatin is fully dissolved, about 5 minutes. Remove from the heat and allow to cool slightly. Stir in the chocolate liqueur, vodka and Baileys.

Remove the chilled ganache layer from the refrigerator. Pour the martini mixture gently over the top. Return pan to the refrigerator and chill until fully set, one to two hours. To serve, cut into desired shapes. Garnish with chocolate shavings if desired.