Grease and line a 20cm x 20cm (8" x 8") baking tin (see my notes).
Place the biscuits into a food processor and process into fine crumbs.
250 g Marie biscuits
Place biscuit crumbs into a large bowl along with sweetened condensed milk, desiccated coconut, melted butter, lime juice and lime zest then mix well to combine.
3 limes - juice and zest, 90 g butter, 90 g desiccated coconut, 200 g sweetened condensed milk
Press base mixture into the prepared tin and smooth the top.
For the frosting, mix together the icing sugar room temperature butter and pomegranate juice until smooth.
300 g icing/confectioners sugar, 70 g butter, 3 tablespoon pomegranate juice
Spread frosting evenly over the biscuit base. Sprinkle with extra coconut and refrigerate until firm.
1 tablespoon desiccated coconut