Take half of the savoiardi biscuits and dip them one at a time into the coffee and arrange over the base off a 2.4 litre (4 pint) shallow dish and sprinkle with a little more Marsala wine. Spread a layer of the mascarpone mixture on the top. (At this stage I find it helpful to chill again to avoid the finished desert being too runny). Add another layer of coffee soaked biscuits and sprinkle with more Marsala.
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