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Sausage Green Bean Potato Casserole

Sausage green bean potato casserole with golden bubbling edges, tender potatoes, and visible sausage crumbles in a creamy cheddar sauce. Baked at 375°F until the top is hot, bubbly, and lightly set for classic comfort food vibes.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 8 servings
Course: Side Dish
Cuisine: American
Calories: 650
Ingredients Equipment Method Notes

Ingredients
  

Italian sausage, cooked and crumbled
  • 1 lb Italian sausage, cooked and crumbled
butter
  • 2 tbsp butter
onion
  • 1 onion large, diced
garlic
  • 4 garlic cloves, minced
potatoes
  • 4 potatoes medium, diced
green beans
  • 4 cup green beans fresh, trimmed
chicken broth
  • 2 cup chicken broth
heavy cream
  • 1 cup heavy cream
sharp cheddar cheese, shredded
  • 1 cup sharp cheddar cheese, shredded
Parmesan cheese, grated
  • 0.5 cup Parmesan cheese, grated
Italian seasoning
  • 2 tsp Italian seasoning
garlic powder
  • 1 tsp garlic powder
salt and pepper
  • 1 salt and pepper to taste
fresh thyme for garnish
  • 1 fresh thyme for garnish

Equipment

  • 1 cast iron skillet
  • 1 sheet pan

Method
 

Brown the sausage
  1. Preheat oven to 375°F. Brown the Italian sausage in a skillet, then remove and set aside until crumbs are cooked through and lightly browned.
Build the creamy casserole
  1. In the same skillet, melt the butter. Sauté the onion for 2 minutes, stirring until translucent and softened.
  2. Add the garlic and cook for 1 minute more, stirring until fragrant with visible bubbles at the edges.
  3. Add the potatoes, green beans, chicken broth, heavy cream, Italian seasoning, and garlic powder. Bring everything to a simmer over medium heat until you see steady bubbling through the sauce.
  4. Stir in the cooked Italian sausage, sharp cheddar cheese, and Parmesan cheese. Stir until the cheeses melt into a thick, creamy mixture that looks glossy.
  5. Season with salt and pepper to taste. Taste and adjust until the flavors pop without tasting under-seasoned.
Bake and serve
  1. Transfer the mixture to a greased 9x13 baking dish. Smooth into an even layer so the edges bake consistently.
  2. Bake for 40-45 minutes at 375°F until the potatoes are tender and the casserole is bubbling at the edges. Look for steam and bubbling channels around the perimeter with a lightly golden top.
  3. Garnish with fresh thyme before serving. Add it right after baking so the aroma stays fresh.

Notes

For the best texture, dice potatoes evenly so they finish tender at the same time; if the casserole seems like it’s browning too fast, tent loosely with foil for the last 10 minutes. Store leftovers in the fridge for up to 4 days. Freeze yes—portion into airtight containers and freeze up to 2 months; thaw in the fridge overnight and reheat until steaming. For a lighter option, use half-and-half instead of heavy cream and reduce cheddar by 1/2 cup (the bake will be slightly less rich but still creamy).