Prepare the base

• Crush the digestive biscuits into coarse crumbs.
• Mix the crumbs with the melted butter and condensed milk until it holds together.
• Press the mixture firmly into a lined baking dish to form an even base.

Make the filling

• Melt the white chocolate gently with the hazelnut spread.
• Fold in the chopped Kinder Bueno and Kinder chocolate bars, keeping some aside for the top.
• Spread the filling over the biscuit base and smooth the surface.

Chill and finish

• Scatter the reserved chopped chocolate and toasted hazelnuts over the top.
• Chill until fully set, then cut into bars.