Grease and flour two 9-in round cake pans; set aside. In large bowl, beat 1 cup sugar, buttermilk, oil, egg yolks, and melted chocolate till blended. Combine flour, 1/4 tsp salt, and baking soda; gradually beat into sugar mixture till blended.
In large bowl with clean beaters, beat egg whites till soft peaks form. Gradually beat in remaining sugar, 1 T. at a time, on high till stiff peaks form. Fold into the batter.
Transfer to pans. Bake at 350 degrees for 18-22 minutes or till a toothpick inserted in the middle comes out clean. Cool for 10 minutes before removing from pans to wire racks to cool completely.
For frosting, beat cream, powdered sugar, cocoa, extract, and remaining salt till stiff peaks form.
Cut each cake horizontally into two layers; brush layers with cream de cacao. Place bottom layer on a serving plate; top with 1/2 cup frosting and sprinkle with 2 T. almonds. Repeat layers twice. Top with remaining cake layer. Spread remaining frosting over top and sides of cake; sprinkle remaing almonds over the top.