For all of them, I just put the seeds/nuts in a blender and blended them and bashed them with the tamper until they turned into a non-Newtonian fluid. The sunflower seeds and pistachios were already roasted and salted, and the peanuts were already roasted and I added a bit of salt and honey.

You need a powerful blender with a tamper for this, though: I have a Vitamix 5200 I bought off Kijiji (because new ones are extremely expensive).

I found that the peanut butter in particular was not really worth it: 1 kg of peanuts seemed to be roughly the same price as a 2 kg jar of peanut butter.

Not below decks where you’ll most likely be sleeping (in close proximity to multiple other warm, sweaty, stinky sailors), I suspect.

Too bad you don’t get paid for it (in fact, you have to pay for it yourself).

I’ve tried making peanut, sunflower seed, and pistachio butter before. Ironically, the peanut butter was my least favourite. The pistachio butter was nice, but I’d rather just eat the pistachios. So the winner is the sunflower seed butter.

https://www.youtube.com/watch?v=s_4J4uor3JE