01 -
First things first, get those green beans ready. I snap off the tough ends, give them a good rinse, then pop them into a pot of lightly salted boiling water. Just a quick blanch, maybe 4-5 minutes, until they’re bright green and crisp-tender. You don't want them mushy! Immediately drain and plunge them into an ice bath—this stops the cooking and keeps their vibrant color. This is where I always forget to salt the water, oops.
02 -
Now for the good stuff, the sauce that makes this a <em>Cheesy</em> Green Bean Casserole. Melt the butter in a large saucepan over medium heat. Once it’s shimmering, toss in your finely diced onion and sauté until it’s soft and translucent, about 5 minutes. Then, add the minced garlic and cook for another minute until it’s fragrant; don't let it burn, or it gets bitter, I made that mistake once and had to start over!
03 -
Sprinkle in the flour over the softened onions and garlic. Stir, stir, stir constantly for about 1-2 minutes until it forms a thick paste and smells a little nutty. This is your roux, the base of our creamy sauce. It’s important to cook out the raw flour taste here, honestly, or your Cheesy Green Bean Casserole will taste off. It might look a bit clumpy, but keep at it!
04 -
Slowly, and I mean <em>slowly</em>, whisk in the milk and chicken broth, a little at a time. This is where patience pays off; you want to avoid lumps. Keep whisking until the sauce is smooth and starts to thicken. Bring it to a gentle simmer, letting it bubble for a few minutes until it coats the back of a spoon. The aroma filling the kitchen is just delightful at this point.
05 -
Reduce the heat to low, then add the cream cheese and half of your grated cheddar and Parmesan. Stir continuously until all the cheese is melted and the sauce is gloriously smooth and velvety. Taste it! Adjust the salt and pepper if needed. This is the heart of our Cheesy Green Bean Casserole, so make sure it tastes amazing. I always sneak a spoonful, to be real.
06 -
Gently fold the blanched green beans into the creamy cheese sauce. Pour the mixture into a 9x13 inch baking dish. Sprinkle the remaining cheddar and Parmesan over the top. Bake for about 20-25 minutes, or until bubbly and golden. In the last 5-10 minutes, scatter those crispy fried onions over the top and bake until they’re perfectly golden brown. The smell? Oh, it’s pure heaven, I tell ya!