Our family is OBSESSED with this recipe. It makes an appearance at every holiday get together-- Christmas, Thanksgiving, Easter, Sunday dinners, everything. We seriously love green bean casserole.
I didn't realize until I was an adult that this recipe is really unique among your typical green bean casseroles. Mainly because it contains absolutely no cream-of-anything condensed soup! There are no mushrooms, no mystery sauce, nothing weird. You'll need butter and flour for a traditional roux. Add to that sour cream, a few seasonings (including a little sugar, which I think is the key secret ingredient), the fried onions and cheese, and then green beans of course!
You'll never make green bean casserole any other way once you've tried our Grandma's recipe. I guarantee it!