Compared to chocolate chip, peanut butter and sugar cookies, oatmeal cookies are marginally more nutritious. Comparing cookies of similar size, an oatmeal cookie has fewer calories than peanut butter or sugar cookies. Oatmeal cookies contain less fat and more protein, fiber and calcium than the others.
However, all of these cookies contain between 54 and 72 calories; 2 and 3.5 grams of fat; 0.4 and 0.9 grams of protein; and 0.1 and 0.4 grams of fiber, so the differences are miniscule Oatmeal cookies do contain significantly more calcium, with 14 milligrams compared to 2 or 3 milligrams in the others; however, with the recommended dietary allowance for calcium of more than 1,000 milligrams, you'd have to eat a lot of oatmeal cookies to make a dent in your daily needs.