If you are doing Option 1, below, you'll need about 1 cup of semi-sweet chocolate, 1 cup of milk chocolate, 2 tablespoons of vegetable oil, and about 1/4 cup of the chopped/toasted hazelnuts
If you are doing Option 2, below, you'll need about 1/2 cup of semi-sweet chocolate, 1/2 cup of milk chocolate, and 1 tablespoon of vegetable oil, and about 2 tablespoons of the chopped/toasted hazelnuts (But to be safe, you better just make more and eat the leftovers with a spoon)
Melt the semi-sweet and milk chocolate chips
Add the vegetable oil and stir until smooth
Add in 1/4 cup or 2 tablespoons (based on which option you decide to do) of the chopped/toasted hazelnuts. Stir until combined. You might have to play around with the amount of hazelnuts you add to the chocolate, based on how finely they are chopped.