Name: Amazing Garlic Parmesan Green Bean Casserole Recipe
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 1.5 lbs fresh green beans, trimmed; 4 tbsp butter; 1 small yellow onion, chopped; 2 cloves garlic, minced; 3 tbsp all-purpose flour; 2 cups milk; 1/2 cup grated Parmesan cheese; 1/4 tsp salt; 1/4 tsp black pepper; 1 (6 oz) can crispy fried onions, divided

Jump to Recipe

Introduction

This Amazing Garlic Parmesan Green Bean Casserole is a fresh twist on a classic side dish. Combining crisp-tender green beans with a creamy garlic Parmesan sauce and crispy fried onions, it’s perfect for family dinners or holiday gatherings.

A rectangular glass baking dish filled with a layered green bean casserole is shown on a white marbled surface. The dish has about three visible layers: the bottom is covered with a thick creamy white sauce mixed with bits of mushroom, the middle layer has bright green beans arranged in rows, and the top layer is a golden brown crust made of crispy fried onions and melted cheese, giving it a crunchy texture. The edges of the baking dish have baked-on sauce marks, showing it just came from the oven. The background is blurred, focusing on the casserole. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

1.5 lbs fresh green beans, trimmed
4 tbsp butter
1 small yellow onion, chopped
2 cloves garlic, minced
3 tbsp all-purpose flour
2 cups milk
1/2 cup grated Parmesan cheese
1/4 tsp salt
1/4 tsp black pepper
1 (6 oz) can crispy fried onions, divided

Instructions

Step 1: Preheat the oven to 350°F (175°C).
Step 2: Steam or boil the green beans until crisp-tender, about 5-7 minutes. Drain well and set aside.
Step 3: In a large skillet, melt the butter over medium heat. Add the chopped onion and cook until softened, about 5 minutes. Add the minced garlic and cook for 1 minute more.
Step 4: Stir in the flour until smooth. Gradually whisk in the milk until the mixture is smooth. Bring to a simmer, stirring constantly.
Step 5: Reduce the heat and simmer for 2-3 minutes, or until the sauce thickens. Stir in the Parmesan cheese, salt, and pepper.
Step 6: Add the green beans to the sauce and toss to coat evenly.
Step 7: Pour the green bean mixture into a 9×13 inch baking dish. Top with half of the crispy fried onions.
Step 8: Bake for 20-25 minutes, until heated through and bubbly.
Step 9: Sprinkle the remaining crispy fried onions over the top and bake for an additional 5 minutes, or until the onions are golden brown.
Step 10: Let the casserole stand for a few minutes before serving.

Tips & Variations

For an extra layer of flavor, add a pinch of nutmeg to the sauce before baking.
Use fresh green beans for the best texture and flavor, but frozen can work in a pinch—just thaw and drain thoroughly.
Substitute half-and-half for milk if you prefer a richer sauce.
Try adding a handful of toasted almonds for added crunch and nuttiness.

Storage

Store any leftover casserole in an airtight container in the refrigerator for up to 3 days. To reheat, cover with foil and warm in a 350°F oven for about 15 minutes or until heated through. Adding a little extra crispy onions on top after reheating can help restore the crunch.

How to Serve

A glass rectangular baking dish on a white marbled surface holds a layered green bean casserole. The bottom layer is creamy and white, visible through the glass edges. Above this, bright green beans stretch horizontally, partly covered by a thick, melted cheese layer that is golden yellow and slightly browned in spots. The top layer is a generous sprinkle of crispy fried onions, golden brown and textured, spread evenly across the casserole. The dish is placed on a black stove with a blurred kitchen background. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I make this casserole ahead of time?

Yes, you can prepare the casserole up to step 7, then cover and refrigerate. When ready to bake, add the topping and follow the baking instructions as usual.

Can I use canned green beans instead of fresh?

While fresh green beans offer the best texture and flavor, you can use canned green beans in a pinch. Drain them well and reduce cooking time since canned beans are already cooked.