With my grandmother's hand written 'tea cup' of this and hand full of that recipes, I have learned to use a scale. Whenever possible, I add the actual weight amounts to those old recipes (some have multiple crossed out or corrected weights as an attempt comes close to memory or fails utterly.
I have never been able to recreate Grandma's Long Johns or chocolate jelly roll. And thankfully, her recipe for 'Glumz' has mostly disintegrated!
I do prefer recipes that have weight amounts instead of measurements. Much more accurate.