01 -
Crush biscuits into fine crumbs using a food processor. In a large bowl, combine the crushed biscuits with ground peanuts, sugar, vanilla sugar (if using), and cocoa powder. Mix thoroughly.
02 -
Melt butter in a saucepan over low heat, then stir in sweet cream until combined. Pour this mixture over the biscuit mixture and mix until everything is well incorporated. The mixture should hold together when pressed. If it's too dry, add a little more cream; if too wet, add more biscuit crumbs.
03 -
Line a rectangular baking dish (approximately 9×13 inches) with parchment paper. Press the biscuit mixture firmly into the dish, creating an even layer. Use the back of a spoon or a flat-bottomed glass to compact it well. Refrigerate for 30 minutes to set.
04 -
Combine milk chocolate and dark chocolate in a heatproof bowl. Melt using a double boiler (a bowl set over simmering water) or in short bursts in the microwave, stirring frequently. Once melted, stir in the vegetable oil to create a smooth, glossy glaze.
05 -
Pour the melted chocolate mixture over the chilled biscuit base and spread evenly using a spatula. Immediately sprinkle the ground peanuts over the chocolate layer. Return to the refrigerator and chill for at least 1 hour until completely set.
06 -
Once fully set, lift the entire slab out of the baking dish using the parchment paper. Use a sharp knife to cut into bars or squares. For the cleanest cuts, wipe the knife between slices.