I make this recipe all of the time, and depending what I am making it for, I sometimes do a half or third of whole wheat, the flavor changes a bit, but it isn't a bad change, just different.
One of my favorite ways to use this recipe is to have chopped tomatoes, chives, garlic powder, and parmesan with about a quarter cup butter in a bowl. When the spatzle is done, I drain and pour into the bowl I toss and add some of cream and pepper. My family really likes it.
I love this recipe--thanks.