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Make Ahead Green Bean Casserole Recipe
Ash Tyrrell

Make Ahead Green Bean Casserole Recipe

I'll be honest, I used to dread squeezing one more dish into my oven schedule on Thanksgiving morning. Once I started prepping my green bean casserole a few days early, my whole holiday got easier. I just mix everything, pop it in the fridge, and bake it when I'm ready.
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Prep Time 15 minutes
Cook Time 45 minutes
Servings: 6
Ingredients Method Notes

Ingredients
  

  • 1 can 10.5 oz cream of mushroom condensed soup – this is the creamy base that holds everything together, so don't skip it even if you're tempted to swap it for something lighter.
  • 2 cans 14.5 oz each cut green beans, drained, rinsed, and patted dry – canned beans keep this a true dump-and-stir recipe; just make sure they're dry so the casserole doesn't turn watery.
  • ⅓ cup milk – this loosens the soup mixture so it coats the beans evenly instead of clumping.
  • 1 tablespoon soy sauce – a small splash adds a savory depth that plain cream of mushroom soup is missing on its own.
  • 1⅓ cups crispy fried onions divided – stir most of them in for texture, but save some for the top so you get that signature crunch.
  • Salt and pepper to taste – season lightly since canned soup and fried onions already carry some salt.

Method
 

  1. In your casserole dish, stir together the cream of mushroom soup, milk, and soy sauce until smooth. I just use a spatula right in the dish to save myself a bowl to wash. Make sure there are no dry soup clumps left before you add the beans.
  2. Stir in your drained, dried green beans along with 1 cup of the fried onions, saving the rest for later. Mix until every bean is coated in that creamy sauce. Spread it into one even layer across the bottom of the dish so it cooks evenly.
  3. Cover the dish tightly with its lid, foil, or plastic wrap and place it in the refrigerator. I've pushed mine as far as 3 days ahead without any issues, so pick whatever day works for your schedule.
  4. When you're ready to cook, pull the dish out and let it rest on the counter for a few minutes while your oven preheats. This little pause helps prevent the cold glass from cracking once it hits the heat.
  5. Preheat your oven to 350°F and place the dish inside straight from this resting period. Let it bake for about 35 to 40 minutes, until it's bubbling around the edges and heated all the way through.
  6. Pull the casserole out and sprinkle the remaining fried onions evenly over the top. Slide it back into the oven for another 5 minutes, just until those onions turn golden brown.
  7. Let the casserole sit for a few minutes once it comes out so it firms up slightly. This also keeps the top layer of onions crisp instead of steaming them soft.

Notes

  • I always pat my green beans completely dry before mixing, since leftover liquid is the main reason casseroles turn watery.
  • I let the dish sit out for about 15-20 minutes before it goes in the oven so the glass doesn't shock from the temperature change.
  • I save every bit of the fried onions for the top layer addition instead of stirring all of them in early, because they stay crunchier that way.
  • I taste the sauce before baking and add a pinch of pepper if it needs it, since the flavor mellows a bit once baked.
  • I double the recipe in a bigger dish whenever I'm feeding a large family group, and it bakes just as well.