Would adding more egg help crumbling cookies? As this is a controversial subject I cannot just ask it to the majority of the women I know that bake. I make cookies for my father who has cancer and was losing weight at an alarming rate until I suggested pot cookies. I have been using Betty Crocker peanut butter cookie mix. The recipe calls for only one egg, I have been having a crumbling issue. It's too expensive to trial and error in this situation. Would adding another egg help?
Adding a whole egg would help, but you might start with adding just one egg yolk. The additional fat will address the dryness which leads to the crumbling.

You may also try other fats like butter, cream cheese, or vegetable oil.

If even one egg yolk is 'too much' for your desired outcome, you might try a small amount of half&amp;half.