Katie Irvin is the pastry chef at Barn8 Restaurant + Bourbon Bar in Goshen, Kentucky, just outside the city of Louisville and its 149th Run for the Roses (May 6). A nutty chocolate pie is a classic Derby dessert, and pistachios make for a particularly winning combination: “The chocolate brings a certain bitterness that pairs nicely with a toasted nut. Pistachios in particular have a bit of sweetness that works with the richness of chocolate,” Irvin says. “The two combined make a really special dessert.”

