Mix base ingredients together in a bowl until you have a moist but slightly crumbly texture. If it seems too dry, add a splash more liquid.
Press base mixture into a lined tray and set aside.
Blend caramel ingredients in a food processor until you have a smooth caramel.
Spread caramel over the base layer.
Melt hazelnut chocolate.
Pour melted chocolate over the caramel layer.
Add toppings (chopped hazelnuts and cacao nibs).
Put into the fridge or freezer for a few hours until the chocolate has fully set.
Slice and enjoy.
