A couple different ways, Karly,
1) go to the site "Sparkrecipes.com" and log yourself in. From there you can create your own recipes with the "My Recipe Box" feature.
2) go to your Nutrition Tracker. In the section where you normally search for your food items, click the tab that says "Recipes" - you will now notice there is an option to search the recipe database or "Access Recipe Calculator." Click that, and you can input your own recipe.