Cocoa powder and brown sugar, for the rim (optional)
Chocolate syrup (optional)
Grated chocolate, for the garnish (optional)
Instructions
Prepare the glass: Wet the rim of a martini glass. Spread 1 tablespoon each cocoa powder and brown sugar on a plate, stir them together and spread into a single layer. Dip the outside of the rim of the glass into the plate. If desired, pour a swirl of chocolate syrup into the martini glass.
Add the Irish cream, creme de cacao and vodka to a cocktail shaker. Fill it with 2 handfuls of ice and shake it until cold.
Strain the drink into the prepared glass. If desired, garnish with grated chocolate.