Chocolate Linzer Cookies with Raspberry Jam Filling Makes approx 4 dozen sandwich cookies 3 cups all-purpose flour ½ teaspoon salt ½ teaspoon baking powder 1 cup unsalted butter, softened 1 cup sugar ½ c light brown sugar 2 large eggs, room temperature 1 teaspoon vanilla extract ⅔ cup cocoa powder Powdered sugar for dusting on top of the cookies Raspberry Jam ( seedless if desired)