Southern Green Bean Casserole
Creamy, comforting green bean casserole with crispy fried onion topping—a Southern classic that's pure comfort food. Ready in under 45 minutes and feeds a crowd.
- Total time
- 40 min
- Servings
- 6
- Calories
- 245
- Protein
- 6g

Ingredients
8 items — tap to check off
Missing one? Custrd suggests a swap that works.
Open the appInstructions
Step 1
Preheat oven to 350°F. Bring a large pot of salted water to a boil.
Step 2
Add green beans to boiling water and cook until just tender, 5–6 minutes.
Step 3
Drain beans in a colander and set aside.
Step 4
Melt butter in a large skillet over medium heat. Add diced onion and cook until softened, 4 minutes.
Step 5
Add mushroom slices and cook, stirring occasionally, until golden, 5–6 minutes.
Step 6
Sprinkle flour over the mushroom mixture and stir constantly for 1 minute to cook out the raw flour taste.
Step 7
Pour in milk slowly while stirring to avoid lumps. Cook until the sauce thickens slightly, 2–3 minutes.
Step 8
Add cooked green beans to the sauce and stir gently to combine. Season with salt and pepper.
Step 9
Transfer mixture to a 9×13-inch baking dish. Scatter fried onions evenly over the top.
Step 10
Bake until the surface is golden and bubbling at the edges, 12–15 minutes.
Step 11
Let rest 2 minutes. Serve warm.
Tools you’ll need
- large pot
- colander
- large skillet
- wooden spoon
- 9×13-inch baking dish
- oven
Cook smarter
Get matched recipes for what’s in your fridge
Custrd is an iPhone and Android app that finds real recipes from the ingredients you already have. No more grocery-list aspirations. Try it free for 7 days.



