Yeah, crêpes seem like the wrong dish.
As an American, I think that natural peanut butter is delicious in the right context. It goes well on puffed rice cakes, with a little salt if it’s unsalted. It’s good with celery as a snack, and it’s an ingredient in some sauces. It can dry out your mouth, so make sure to drink water too.
The classic American use is peanut butter sandwiches, optionally with jam. IMHO these are pretty mid, but their main advantage is that they’re energy dense and don’t require refrigeration. So they’re good for hiking, at least if you have enough water.
Edited to add: also good in cookies, with chocolate, with bananas, and probably some other things I’m forgetting.