I know this was last posted in a month ago, but saw the thread had started 3 years ago and I replied then that I had trouble with peanuts and pb and found dry roasted edamame and pumpkin seeds much easier.
I thought I would follow up- they are easy for me now, but I do use a quarter cup "pinch cup" (i bought a set of six for maybe $7 or so). They measure a perfect ounce. I use them for nuts, seeds and dips (two servings most dips is one quarter cup).
I also do fine with pb in single serve packets like justen's.

Sooo.... you might find you can try again down the road?