Thank you @arrozymangophoto! Yes, you're right, hazelnuts are healthy fats. I'm sorry I didn't had time for writting some nutritional facts about them.
Well, you can DEFINELY do it with peanuts. The result will be peanut butter!!! MAybe you heard of it. It is the same method of preparation, but the taste will be all about peanuts. Also, the consistency will be the same with this butter of mine. Peanut butter is super popular and I love it! Try it, is much better than buy it and also, it has some benefits.

Greetings for you too from Romania!!
Have a wonderful day!