01 -
Line an 8x8-inch tin with baking paper. Set aside for now.
02 -
Add the Custard Cream biscuits to a food processor or high power blender and blitz until you have fine crumbs.
03 -
Add the Custard Cream crumbs to a large bowl with all of the melted butter and 80 ml (⅓ cup) of the condensed milk. Mix it together until you have a wet dough. Press it down into your lined tin.
04 -
Break the white chocolate into pieces and add it to a heatproof bowl with the rest of the condensed milk. Place the bowl on a double boiler and gently heat on low until the chocolate has melted, stirring occasionally. Alternatively, melt in the microwave, stirring every 15 seconds.
05 -
Working quickly once removed from heat, pour the melted chocolate and condensed milk mixture over the biscuit base in the tin. Press it down firmly into place using a rubber spatula.
06 -
Top with additional Custard Cream biscuits if desired.
07 -
Refrigerate for 3 hours until the topping is firm to the touch. Cut into slices and serve.