Cover the bottom and edges of a rectangular baking form.
Melt the butter in a casserole or in the microwave.
Crush the biscuits in to crumbles and mix it well with the melted butter.
Pour the mixture evenly in the baking form so it covers the bottom, press it so you have a compact cake bottom.
Preheat the oven at 150 degrees Celsius.
Melt the chocolate in a casserole on low heat.
Mix the Philadelphia cheese and the sugar soft with an electrical mixer.
While stirring add the eggs and the sour cream.
Cut the candied orange peel in small pieces.
Stir gently and add the melted chocolate and the Orange jam in the mixture.
Pour the filling on top of the biscuit bottom, and place the baking form in the middle of the oven for 45 minutes.
Take out the cake and let it cool down before taking it out from the form. Sprinkle it with the cacao powder.
Cut the cake in small squares or rectangles, and decorate them with some chocolate bites of your choice.