Chocolate Truffle Tart Ingredients For Crust: 28 chocolate wafers finely ground in a food processor (about 1 cup) 6 Tbsp unsalted butter, melted and cooled completely For Filling: ½ lb fine-quality bittersweet chocolate (no more than 60% cacao), coarsely chopped 6 Tbsp unsalted butter, cut into ½-inch cubes 2 large eggs, lightly beaten ⅓