Hola, if you do a Google search for "recipe calorie calculator," a whole slew of sites will come up that do just what you've described.
There's one in particular I like, but I'm wary of seeming as if I'm promoting a different site, so I'll leave it at your discretion.
Alternately, you can put in all the ingredients in FitDay as a custom food, and then get the total nutrient values. Now, this will default as "one serving," but if you know that the total recipe will make 8 servings, then you could enter ".125" in order to get the info for one serving. I'll be the first one to say that that's rather cumbersome, but it is one way of doing it.