Process first 5 ingredients in a food processor until mixture becomes fine crumbs. Add 5 tablespoons melted butter; pulse 3 or 4 times or until combined. Firmly press crumb mixture into bottom and 1 inch up sides of a 10-inch springform pan.
Bake at 350° for 15 minutes. Cool completely on a wire rack.
Heat 2 cups whipping cream in a large saucepan over medium heat; bring to a simmer. Remove pan from heat, and add 16 ounces chocolate, stirring until chocolate melts. Add 1/2 cup butter and corn syrup, stirring until smooth. Pour fudge into prepared pan. Chill 1 hour or until firm.
Heat 12 ounces chocolate, 6 tablespoons butter, and 1 teaspoon coffee granules in a saucepan over low heat, stirring constantly, until chocolate is melted and smooth. Pour chocolate mixture into a small bowl. Set aside.
Bring 1/2 cup granulated sugar and 3 tablespoons water to a boil in a small heavy saucepan over medium heat, stirring constantly. Cook mixture 2 minutes or until a candy thermometer registers 240° (soft ball stage).
Meanwhile, beat egg whites at high speed with an electric mixer until soft peaks form. Gradually beat hot syrup into egg whites. Continue beating until medium-stiff peaks form, about 3 minutes. Fold in 1 cup reserved chocolate mixture. Spread cappuccino mixture evenly over fudge layer.
Combine 1/4 cup whipping cream and remaining 5 teaspoons coffee granules in a large bowl, whisking until coffee dissolves. Add remaining 1 1/2 cups whipping cream, powdered sugar, and cinnamon. Beat at high speed with an electric mixer until stiff peaks form. Fold in remaining 1/2 cup chocolate mixture. Reserve 2 cups mousse; spread remaining mousse evenly over cappuccino layer. Pipe reserved mousse around top of cake. Cover and chill 8 hours. Store in refrigerator.
Tip: When preparing the mousse, the reserved chocolate will be a bit thick, causing a speckled look in the mousse mixture. For a fun touch, top this mousse layer with large chocolate curls.
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