How can I harden Nutella?

[msrisotto]

I'm thinking of topping my flapjack with a layer of Nutella. As it is though, it'll be too soft so I want to harden it, changing the flavour as little as possible. Would adding melted butter harden up? Or a few dark chocolate pieces? Any ideas?

I meant sandwhiching layers of flapjack together with Nutella after they're cooked misriissotto.

Hmm potentially. Mmm

I decided to leave most naked and spread nutella on top of two pieces and have put them in the fridge.

Someone may have suggested this but can you sandwich the Nutella in between two flapjacks?

These two ingredient Nutella brownies are lovely.

Maybe next time you make flapjacks add a layer of the brownie mix on top before baking and make a sort of double decker?