Line the baking tray with aluminium foil, pressing it firmly into the corners and sides

Put the white chocolate in a heatproof bowl and pour in the condensed milk. Microwaves on full power for 30 seconds. Remove and stir, heating for 20-second bursts at a time, until all the chocolate has melted and the mixture is thick and smooth.

Spread half the crushed Oreos over the bottom of the tray. Allow the chocolate and condensed milk mixture to cool slightly before pouring it over the cookies, spreading it out evenly.

Arrange the remaining Oreos on top and press them down with your fingertips. Smooth the surface of the fudge using a knife dipped in boiling water so the top of flat.

Place the tray in the fridge for 4 to 5 hours to set. Use a shape knife to cut the fudge into bite-sized pieces before serving.

Tip

If you don't have Oreo cookies, try this with chocolate digestives, Hobnobs, bourbon biscuits and even Terry's Chocolate Orange.