1 cup = 1/3 of a rhubarb pie, depending on recipe
One cup of rhubarb provides the following percent of your daily requirements:
16% vitamin C
10% calcium
9% dietary fiber
2% vitamin A
There is about one cup of rhubarb in a single piece of rhubarb pie, one rhubarb margarita and a single serving of many other rhubarb dishes. organic rhubarb is further beneficial as it is free of chemical insecticides and fertilizers.This information is provided courtesy of NutritionData.com