Absolutely. The whole wheat flour adds a delicious nuttiness to the pancakes, but they will be just as delicious with 2 total cups of all-purpose flour instead. I do not recommend substituting the all-purpose flour for whole wheat, though. The all-purpose flour in the recipe helps keep the oatmeal pancakes light and fluffy. If you use only whole-wheat flour, they will be too heavy and you will lose the fluffy texture.