And you don't even need a campfire to make this decadent snack ... Dollop some homemade or store-bought cookie dough on top of your prepared brownie batter mix before baking.
Using all chocolate can make brownies quite dense and extremely rich, which may well be your thing, in which case try this rich brownie recipe ... chocolate chunks or a mix.
Make little wells in the brownie mix and add spoonfuls of the mixture. Sprinkle over the remaining hazelnuts and press down lightly. Bake in the preheated oven for around 30 minutes, testing after ...