Double Chocolate Pecan Sandwiches

Batter

• 8 tablespoons (1 stick) unsalted butter, softened
• ½ cup sugar

1. Set racks in the middle and upper thirds of the oven and preheat to 350 degrees.
2. In a bowl, cream the butter until it’s light. Beat in the sugar in a stream and continue to beat until the mixture whitens. Add the egg whites, one at a time, and continue