Warm Molten Chocolate Cakes

INGREDIENTS

• 8 oz. bittersweet chocolate, finely chopped
• 4 Tbs. (1/2 stick) unsalted butter, cut into pieces
• 1 tsp. vanilla extract
• Pinch of salt
• 4 egg yolks
• 6 Tbs. sugar
• 2 Tbs. Dutch process cocoa powder, sifted
• 1 tsp. finely grated orange zest (optional)
• 3 egg whites, at room temperature
• Crème anglaise for serving (see related recipe
• at left) (optional)