Buy a bag of Good Value cashews as Walmart and give them a whirl in the food processor. Bingo, you have cashew butter.
No, the “butter” process is a bit more involved than that. I’ve done from scratch peanut butter, a lot of work, not very tasty. I’ll continue to buy my cashew butter, as I have better things to do with my time than make bad imitations of good products easily purchased.