Step 1

Place chocolate chips in a large bowl.

Step 2

Heat 1/2 cup cream in a small saucepan over medium-high heat until it begins to rise and foam, watching carefully so it doesn't spill over, 3 to 5 minutes. Pour over chocolate chips and cover for 1 minute.

Step 3

Remove cover and slowly stir with a spatula until smooth. Stir in hot coffee and vanilla extract until all chocolate has melted.

Step 4

Whip remaining 1 cup cream in a chilled glass or metal bowl with an electric mixer until soft peaks form. Gently fold cream into chocolate mixture until combined.

Step 5

Spoon into glasses and refrigerate until firm, at least 3 hours.