Heat the orange marmalade in a small pot or in the microwave for a couple of seconds. Take off heat and stir well. Grind cookies in a food processor and grate the marzipan.
Knead all the ingredients apart from chocolate and coconut together until a homogeneous dough forms. Let the truffle dough rest while you melt the white chocolate in the microwave or over a baine marie.
Roll the truffles using about 1 tsp at a time, dip the truffles into the white chocolate and roll about half of them in the grated coconut flakes. Let them cool on a wire rack until the chocolate has set.