Preparation Stir espresso, 1/2 cup sugar, and vanilla in a medium bowl until sugar dissolves. Pour into a 9 x 9 x 2" metal baking pan. Freeze for 1 hour. Stir, mashing any frozen parts with the back of a fork. Cover; freeze until firm, about 2 hours. Using a fork, scrape granita vigorously to form icy flakes. DO AHEAD: Can be made 3 days ahead. Cover tightly with foil; keep frozen. Give it a quick scrape before serving. Beat cream and remaining 1 tablespoon sugar in a large bowl until peaks form. Divide granita among bowls or glasses. Top with whipped cream and garnish with chocolate shavings.
Preparation Stir espresso, 1/2 cup sugar, and vanilla in a medium bowl until sugar dissolves. Pour into a 9 x 9 x 2" metal baking pan. Freeze for 1 hour. Stir, mashing any frozen parts with the back of a fork. Cover; freeze until firm, about 2 hours. Using a fork, scrape granita vigorously to form icy flakes. DO AHEAD: Can be made 3 days ahead. Cover tightly with foil; keep frozen. Give it a quick scrape before serving. Beat cream and remaining 1 tablespoon sugar in a large bowl until peaks form. Divide granita among bowls or glasses. Top with whipped cream and garnish with chocolate shavings.