1. In a heavy saucepan combine the cream, salt, sugar, vanilla and coffee. Heat over medium until bubbles form around the rim of the cream.
2. Take the pot off the heat and whisk in the chocolates until the cream is smooth. Pour into ramekins or demitasse cups. Cool to room temperature, then cover and refrigerate.
3. Serve close to room temperature, topped with dollops of cream.
"Water is your enemy in ice cream," says Jeni Britton Bauer, author of Jeni's Splendid Ice Creams at Home. "That's what turns into ice." She shares her tips for fighting the enemy when making ice cream at home.