Here is my favorite homemade Nutrigrain bar. I made mine with homemade blackberry jam. I have used all kinds of jam inside, depending on which needs to be used up first. You only use 5 ingredients: yellow cake mix, oatmeal, jam, water and butter. The recipe I found was from Todd Wilbur's Restaurant Clones, but the same recipe is here on the internet. The cost would probably be about the same, depending on if you made your own jam, but this makes a whole 9x13 pan full of bars and they freeze well. If you decide to try them, leave a comment and let me know what you think.