Ingredients

1 1/2 c. all-purpose flour

1/2 c. Unsweetened cocoa powder

1 tsp. baking soda

1 tsp. baking powder

1 tsp. salt

1 c. unsalted butter

1 c. packed light-brown sugar

1 large egg

1 c. unsweetened applesauce

1/2 tsp. pure vanilla extract

1 c. confectioners’ sugar

Orange nonpareils or sanding sugar

Preparation

Step 1Preheat oven to 375 degrees F. In a medium bowl, whisk flour, cocoa, baking soda, baking powder, and salt; set aside.Step 2In a large bowl, using an electric mixer, beat 1/2 cup butter and brown sugar until light and fluffy. Add egg; beat until smooth. With mixer on low, alternately add flour mixture and applesauce, beginning and ending with flour mixture. Mix just until smooth (do not overmix).Step 3Drop dough by heaping tablespoons, 2 inches apart, onto two baking sheets. Bake until a toothpick inserted in the center of a cookie comes out clean, 10 to 14 minutes. With a thin metal spatula, immediately transfer cookies to a wire rack; let cool completely.Step 4Meanwhile, make filling: In a large bowl, using an electric mixer, beat vanilla and remaining 1/2 cup butter until light and fluffy. Gradually add confectioners sugar, beating until smooth.Step 5Spread bottom of half the cookies with 1 tablespoon filling each; sandwich with remaining cookies, pressing gently so filling oozes out slightly. Sprinkle exposed filling with nonpareils. Let rest 15 minutes to set. (To store cookies, keep in an airtight container at room temperature, up to 2 days).