How to Make Lemon-Blueberry Bars

Hedy Goldsmith's smooth lemon bars studded with fresh blueberries come with a secret weapon: a buttery blueberry crust. Dehydrated blueberries ground into a fine powder will incorporate perfectly into a standard crust mixture of butter, flour and confectioners' sugar.

Using your food processor, grind 1/2 cup of dehydrated blueberries into a powder (you should have 1/3 cup powder when all is said and done). For assorted dehydrated fruits, Hedy recommends checking online or at Trader Joe's, Fresh Market or Whole Foods Market.

To start, heat the oven to 350 degrees F and butter a 9-by-12-inch baking dish. Then, in the bowl of a food processor, combine the flour, confectioners' sugar, blueberry powder, lemon zest, salt and cold butter cubes. 

Pulse several times until a ball starts to form. Place the dough in the buttered dish and press down firmly to form an even bottom crust. Bake until the crust is golden brown, 20 to 25 minutes. Let cool slightly. Set aside.