This is a recipe for a rich mocha chocolate tart that can be made without an oven. The base is made from crushed biscuits and melted butter, and then a rich coffee chocolate cream is poured over it, which is made by melting chopped white chocolate with warmed heavy cream and instant coffee, and then adding butter. The appeal of this recipe is that it is easy to make, as it is completed simply by chilling it in the refrigerator until firm. For the finishing touch, decorate it with cocoa powder and almond slices, and you can easily enjoy a visually appealing adult chocolate tart.