Cherry-Brownie Baked Alaska

Make the brownies: Preheat oven to 325 °F. Lightly coat a 13- by 9- by 2-inch baking pan with softened butter. Line the bottom of the pan with parchment paper and coat lightly with softened butter. Dust the pan with flour and set aside. Melt the butter, unsweetened chocolate, and bittersweet chocolate in a heatproof bowl over a gently simmering pot of water; remove from heat. Beat the eggs and 1 cup of the sugar together until combined in a large bowl using a hand whisk. Stir in the kirsch, vanilla, and salt. Add the chocolate mixture and stir until just combined. Stir in the flour and the dried cherries. Spread batter evenly in the prepared pan. Bake on the middle shelf of the oven for about 40 minutes. Cool completely in the pan on a wire rack.