A delicious no-bake cheesecake with a surprise chocolate layer hidden below the surface. You're almost guaranteed to get plenty of oohs and ahhs when the chocoalte is discovered. The combination of salty biscuity crumb, sweet chocolate and tangy cream filling is a particularly good one.
Melt the butter in a small saucepan over a gently heat.
Meanwhile, place the biscuits in a large bowl and bash them with the end of a rolling pin until you've turned them into crumbs. Alternatively use a food processor.
Pour in the butter and mix.
Scrape into a round 20cm (8") flan dish or tart tin and use your fingers to mould the crumbs to fit the bottom and sides (as you would with pastry).
Break 180g of the chocolate into small pieces, keeping the remainder back for decoration. Place in a bowl suspended over a pan of hot, but not boiling water and leave the chocolate to melt.
Stir until smooth, then pour over the biscuit base. Spread it out as much as possible withe the back of a spoon. Leave to set.
Cheesecake Layer
Meanwhile, mix the cream cheese with the sugar.
Whip the cream until soft peaks formed. You can do this by hand or with an electric whisk.
Fold in the yoghurt, then fold the mixture into the cheese until it's well mixed.
Grate ¾ of the lime zest into the cheese mixture. Stir, then spoon it onto the set chocolate layer and smooth out.
Grate the reserved chocolate over the top and scatter the remaining lime zest over the surface.
Notes
You can use more sugar if you like, but the milk chocolate is already quite sweet and it's nice to have a foil for it.