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White and dark chocolate mousse cake without eggs or gelatin

Double Chocolate Mousse Cake (Eggless, No-Bake)

Decadent white and dark chocolate mousse cake on a Oreo base. No eggs or gelatin.
Prep Time: 20 minutes
Total Time: 20 minutes
Makes: 8 " cake

Ingredients
  

For the base

  • 120 gms Oreos, chocolate flavour recommended
  • 4 tbsps melted butter

For the mousse layers

  • 200 gms white cooking chocolate, finely chopped
  • 200 gms dark cooking chocolate, finely chopped
  • 2 tbsps unsalted butter, at room temp
  • 3 tbsps caster sugar
  • 1 and 1/2 cups chilled whipping cream
  • Extra whipped cream and chocolate sprinkles to top, optional

Instructions

  • First make the base. Blitz the Oreos in a food processor until they're very finely crumbed, like a powder. Pour in the melted butter and blend once to combine. Press the mixture into the base of an 8" springform tin. Chill for 30 minutes.
  • In the meantime, melt the white and dark chocolate in separate bowls, with 1 tbsp butter added to each. You can melt them one at a time in a double boiler or in the microwave. If using a microwave, heat in 10 second increments, stirring in between to melt any lumps, but do not overheat the chocolate. Set both aside at room temperature.
  • Now beat the chilled whipping cream till fairly stiff peaks form, with only slightly rounded tops.
  • Fold half the whipped cream into the white chocolate. Be gentle as you want the mixture to remain airy. Keep folding until it is smooth and combined. Now spread half of this mixture onto the chilled Oreo base. Place in the fridge and keep the remaining mousse mixture in the fridge too.
  • Fold the other half of the whipped cream into the dark chocolate. Begin by just adding a couple of spoons of the cream to help stabilise the chocolate as dark chocolate tends to be thicker and needs to be loosened first. When you've added all the cream, add the 3 tbsps of sugar as well. Fold gently till smooth and combined, then spread half over the chilled white chocolate layer and place in the fridge for 10 minutes. Leave the remaining dark chocolate mousse mixture to chill as well.
  • Now spread the other half of the white chocolate mousse onto this dark layer. Chill again for 10 minutes. All this chilling is necessary to make sure the layers don't mix too much.
  • Finally, spread the remaining half of the dark chocolate mousse and smoothen the top. If you find that the mousse has thickened a little, let it sit at room temperature for 5 minutes before spreading.
  • If this is all confusing, just remember biscuit-white mousse-dark mousse-white mousse-dark mousse. Or make one big layer of white and one big layer of dark and you're done!
  • Leave the cake in the fridge for about 4 hours to help it set and firm up. The dark layer will thicken a bit more than the white layer, but the overall effect is light and airy. Top with more whipped cream and chocolate sprinkles if you're feeling decadent! Keep chilled at all times and it should last for about a week in the fridge and a month in the freezer. Happy mousse-ing!

Notes

*Good quality chocolate is recommended for both the white and the dark. However, this time I used white chocolate chips because it's what I had on hand and they tend to be as sweet as the white cooking chocolate bars. For the dark chocolate, there is a fair bit of difference between chips and cooking chocolate, so for this layer, I highly recommend sticking to the bars.
*I used Amul whipping cream which I got on Big Basket. Make sure your cream is chilled at least 24 hours. Before whipping the cream, place your bowl and beaters in the fridge for 20 minutes.
*Prep time does not include chilling time.