Black Opal Drinks Lifestyle Alexis N. Crockett May 4, 2010 0 464 1 minute read Ingredients: Glass: 90ml Cocktail Glass Mixers: I Sml Opal Nera 15ml Baileys IrISh Cream 15ml Cointreau 15ml cream Method: Layer Opal Nera, Baileys, Cointreau and cream.