Belgian Truffle Cheesecake

Description
Belgian Truffle Cheesecake, one of the finest desserts served in Belgium and over the world. Requires good cooking skills but it's all worth it when you taste it !

Crust

 * 200 g / 7 oz plain chocolate
 * 75 g / 3 oz butter, melted
 * 225 g / 8 oz digestive biscuits or wafer cookies, crushed

Filling

 * 225 g / 8 oz caster sugar
 * 250 g / 9 oz cream cheese
 * 4 eggs
 * 90 ml / 3 fl.oz hazelnut liqueur
 * 8 squares plain chocolate
 * 120 ml / 4 fl.oz sour cream

Topping

 * 240 ml /8 fl.oz sour cream
 * grated plain chocolate
 * icing sugar

Directions

 * 1) Preheat the oven to 180°C, 350°F, gas mark 4.
 * 2) Melt the butter in a medium saucepan then add the biscuit crumbs and mix well.
 * 3) Press the mixture evenly over bottom and up sides of a 22 cm / 9-inch spring+form tin to within 1 cm / ½-inch of the top.
 * 4) Refrigerate while preparing filling.
 * 5) Place the chocolate in a heatproof bowl and set over a pan of boiling water.
 * 6) Stir to melt.
 * 7) In a large mixing bowl, beat together the cream cheese and sugar until well blended and smooth.
 * 8) Add the eggs one at a time, beating well between each addition.
 * 9) Beat in the liqueur and melted chocolate until well mixed then blend in the sour cream.
 * 10) Pour onto the crumb base, smooth top with a palette knife and bake for 45 to 55 minutes or just until the centre has just set.
 * 11) Cool in the tin on a wire rack, then refrigerate for 8 hours.
 * 12) To serve: run sharp knife around the edge of cake to loosen then remove the sides of the tin.
 * 13) Spread the top of the cake with an even layer of sour cream and decorate with grated chocolate and sprinkle with icing sugar.