Espresso powder is one of my favorite flavor boosters. It instantly enlivens the flavor of so many ingredients, including the rich nut filling of these little tarts. I like the way these individual tarts look, but if you prefer, you can make one 8-inch tart rather than four 4-inch tarts. A little scoop of ice cream is essential—I like coffee best, but chocolate and vanilla are yummy, too.
Excerpted from Icebox Desserts, by Lauren Chattman. © 2005, used by permission from The Harvard Common Press.