BLACK FOREST LAYER CAKE

Steps:

• Heat oven to 350°F. Spray bottoms and sides of 3 (8-inch) round cake pans with cooking spray; line with cooking parchment paper.
• In small bowl, mix flour, baking powder, baking soda and salt. In another small bowl, beat baking cocoa and 1 1/4 cups water with whisk until well blended. Set both bowls aside.
• In bowl of electric stand mixer fitted with paddle attachment, beat 2/3 cup softened butter and 1 1/3 cups sugar on medium speed 2 to 3 minutes, scraping bowl occasionally, until light and fluffy. Reduce speed to low; beat in eggs, one at a time, just until smooth. Beat in 2 teaspoons vanilla. On low speed, beat in one-third of the flour mixture, then half of the cocoa mixture, beating well after each addition, just until smooth. Repeat with flour mixture and cocoa mixture, ending with flour mixture. Scrape side of bowl occasionally. Pour 1 2/3 cups batter in each pan; spread evenly. Tap pans on counter 2 to 3 times to eliminate air bubbles from batter.
• Bake 18 to 22 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes; remove from pans to cooling racks. Cool completely, about 1 hour.
• Meanwhile, in 1-quart saucepan, beat 1/2 cup sugar and the cornstarch with whisk. Beat in 1/3 cup water until smooth. Stir in chopped cherries. On medium-high heat, heat cherry mixture to boiling; boil 1 minute, stirring constantly. Remove from heat; stir in 1 tablespoon butter. Pour into small bowl. Refrigerate uncovered at least 1 hour.
• In medium glass or metal bowl, beat egg whites and 1 1/2 cups sugar with whisk until blended. Set over pan of simmering water, beating occasionally, 16 to 20 minutes or until sugar has dissolved and egg mixture reaches 160°F. Remove from heat; pour into bowl of electric stand mixer fitted with whisk attachment. Beat on high speed 2 to 3 minutes or until glossy peaks form and bowl has cooled to feel slightly warm. Still on high speed, slowly add 1 1/2 cups butter, one piece at a time, scraping side of bowl occasionally, until mixture is smooth, thick and shiny, 12 to 14 minutes. Beat in 2 teaspoons vanilla. If mixture separates, beat until smooth.
• Fit decorating bag with 1/2-inch round piping tip; fill with frosting. Place one cake layer on serving plate. Pipe a thick frosting border around top edge of cake layer. Pipe a second border just inside the first border. Spread 2/3 cup of the cherry filling over top of cake inside borders. Top with second cake layer; repeat borders and filling. Place third cake layer on top. Frost side and top of cake with remaining frosting. Press shaved chocolate around bottom half of cake. Refrigerate 1 hour.
• When ready to serve, mound maraschino cherries in center of cake. Store loosely covered in refrigerator.