Chop the Oreos into reasonably chunky pieces, or if you are short on time or patience (like me!) blitz them in a processor until chunky crumbs form. Just be careful not to go too small.

Pour the condensed milk into a large saucepan and break in the white chocolate. Gently melt together, stirring constantly, over a low heat until smooth.

Take off the heat and add in two thirds of the chopped Oreos. Stir until evenly distributed then quickly pour into the prepared tin.

Spread out using a spatula or the back of a spoon, then sprinkle over the remaining Oreos and press into the top.

Allow to cool for 15-20 minutes at room temperature, then place in the fridge to chill for about 4 hours or overnight if you have the time.

Once the fudge has completely set, remove from the tin & cut into an 8 by 8 grid to make 64 pieces. (Or however many pieces at whatever size you like.)

This will store in the fridge in an airtight container for up to 1 week.