I've often heard that humans can't eat grass because our digestive system can't process it. Cows can because of their multiple stomachs. But what if I brewed or boiled the grass like a tea and drank the broth. Would any of the carbohydrates make it into the broth? Would I be able to process them? Would the calories from the broth offset the cost of collecting the grass?

I'm asking in a survival sense, not out of a desire to make grass tea.