Green Pea Casserole

My green pea casserole is filled with tasty sweet peas, a creamy sauce, and crunchy fried onions. The perfect side dish to any meal!

4.34 from 3 votes

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Course: Side Dishes

Cuisine: American

Prep Time: 10

Cook Time: 35

Total Time: 45

Servings: servings

Calories: 382kcal

Author: Jennifer Stewart

Preheat oven to 350F. Remove peas from the freezer and thaw.
In a medium skillet, melt the butter over medium heat.
Add the onion and garlic to the butter and cook for 1-2 minutes or until the onion softens and the garlic is fragrant.
Add the flour and whisk to combine. Cook for 1-2 minutes or until the raw flour flavor is gone.
While whisking, add the half & half. Continue whisking in the pan until it thickens and coats the back of a spoon.
Remove from the heat.
Prepare an 8x8 baking dish with nonstick cooking spray.
In a large bowl, combine the thawed peas, the drained mushrooms, the shredded cheese, and the thickened onion/garlic mixture.
Stir to combine.
Pour into the prepared baking dish and spread evenly.
Bake at 350F for 20 minutes.
Remove and spread the fried onions over the top evenly.
Bake for an additional 5 minutes.
Remove from the oven and enjoy!

If your roux appears too “soupy”; this is usually caused by too much milk. To fix this, add in a little more cornstarch or flour and mix well. This should help thicken up your sauce!
If using a canned cream soup; any cream soup will work if you are not a fan of cream of mushroom soup.
Not interested in freezing leftovers? Use leftovers and create a new dish! Some examples are: pot pie, stuffed mushrooms, create a hash, or add to pasta for a green pea pasta salad!