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chocolate mousse cake on cake stand

Chocolate Mousse Crunch Cake

  • Author: Kate Jones


An easy chocolate mousse and toffee filling is sandwiched between moist layers of chocolate cake and finished off with rich, gooey ganache and more toffee bits.


1 package Duncan Hines Devil’s Food Cake
1 recipe (give or take a little) Chocolate Ganache
Crushed Heath bars or a bag of chocolate-covered Heath bits
1 teaspoon unflavored gelatin
1 tablespoon cold water
2 tablespoons boiling water (just heat it in a small bowl in your microwave)
1/2 cup sugar
1/4 cup unsweetened cocoa powder
1 cup whipping cream
1 teaspoon vanilla
Optional: extra sweetened whipped cream for serving


Bake cake according to cake mix instructions in 2 8″ round pans. Allow to cool and set aside. This can be done several days in advance; just freeze the cakes when you’re done.
In a small bowl, combine gelatin and cold water and allow to stand for about 1 minute. While gelatin is softening, bring about 1 cup of water to a boil in the microwave and measure out 2 tablespoons. Discard the rest. Whisk the 2 tablespoons of boiling water into the softened gelatin and allow to cool slightly.
In a medium mixing bowl, combine sugar, cocoa powder, whipping cream, and vanilla. Beat with an electric mixer until medium-stiff peaks form. Mix in gelatin mixture and refrigerate for 30 minutes.
Prepare ganache (if you haven’t already) according to directions.
With a serrated knife, carefully slice the dome-iest part of each cake layer off so the layers are level. Place one layer on the serving plate and spread chocolate mousse over the cake (see note below). Sprinkle with Heath bits.

Place second layer on top of Heath bits.

Spoon ganache over the top layer, allowing it to drip down the sides.  Sprinkle with additional Heath bits and refrigerate until ready to serve. If desired, top with sweetened whipped cream before serving.


This recipe makes more mousse than you will probably need. Feel free to use as much or as little as you desire in the filling and snack on the rest!

Keywords: Chocolate Cake, Chocolate Mousse, Chocolate Crunch Cake, Occasion cake