A cheesy hashbrown casserole is the kind of comforting dish that feels instantly warming. Creamy layers, tender shredded potatoes, and golden edges make it a favorite for holidays, potlucks, or a relaxed weekend brunch. This gluten-free version delivers the indulgent flavors of a classic hashbrown casserole with a homemade cheese sauce that melts into every bite.
Why You’ll Love This Recipe
If you love hashbrowns and comforting, potato-forward casseroles, this cheesy hashbrown casserole is for you. It’s perfect as a holiday side, a potluck contribution, or a make-ahead brunch dish for Christmas morning or Thanksgiving. The gluten-free adaptation keeps the nostalgic flavors while using a stovetop-thickened, smooth homemade sauce.
The sauce relies on a gluten-free 1:1 flour, milk, chicken broth, and blended cottage cheese to create a rich, velvety base that bakes into tender, satisfying potatoes. I tested variations to ensure the sauce stays smooth with gluten-free flour, and this method consistently delivers.
Ingredients You’ll Need
- 32 oz frozen hashbrowns: shredded potatoes that bake evenly (Cascadian Farm works well)
- 2 tbsp olive oil: to soften the aromatics
- 1 onion & 3 cloves garlic: finely diced and minced for a savory base
- ¼ cup gluten-free 1:1 flour: for a smooth, thickened sauce (King Arthur is a reliable choice)
- 1 ½ cups milk: any unsweetened variety, dairy or dairy-free
- 1 cup chicken broth: adds depth to the sauce
- ¾ cup cottage cheese: blended until smooth for a creamy finish
- 8 oz shredded sharp cheddar: melts beautifully into the sauce
- ¼ cup butter: for toasting the topping
- 2 cups gluten-free cornflakes: optional crunchy topping; can be swapped for extra cheddar
- Seasonings: 1.5 tsp salt, ½ tsp pepper, 1 tsp garlic powder, 1 tsp onion powder, 1 tsp paprika
How to Make This Cheesy Hashbrown Casserole
Step 1: Preheat the oven to 350°F. Grease a 9×13-inch dish. In a large, deep skillet, heat the olive oil and sauté the diced onion and garlic until softened and fragrant.
Step 2: Stir in the gluten-free flour to form a paste. Slowly whisk in the milk, then the chicken broth, keeping the mixture smooth.
Step 3: Add the salt, pepper, garlic powder, onion powder, and paprika. Whisk constantly over medium heat for 3–5 minutes until the sauce has thickened and is pourable.
Step 4: Reduce heat to low, then stir in the blended cottage cheese and shredded cheddar. Stir until the sauce is smooth and the cheese is melted.
Step 5: Fold the fully thawed hashbrowns into the cheese sauce, mixing gently to coat each piece.
Step 6: Spread the mixture evenly into the prepared 9×13 dish using a spatula.
Step 7: In a medium skillet, melt the butter and toast the gluten-free cornflakes for 3–5 minutes until golden. Sprinkle the toasted cornflakes over the casserole. (If you prefer, omit the cornflakes and use an additional ¾ cup shredded cheddar for a fully cheesy topping.)
Step 8: Bake uncovered for 35–40 minutes, until the sauce is bubbling and the top is crisp and golden. Let rest a few minutes before serving. Enjoy!
Tips for the Creamiest Hashbrown Casserole
- Thaw the hashbrowns completely: This prevents excess liquid and helps the casserole cook evenly.
- Keep the sauce pourable: A sauce that’s too thick won’t allow the potatoes to absorb flavor; thin slightly with a splash of milk or broth if needed.
- Make ahead: Assemble the casserole and refrigerate up to 24 hours; add the topping right before baking.
- Topping options: Toasted gluten-free cornflakes give a crunchy finish; substitute extra cheddar for a softer, cheesier top.
How to Keep Hashbrown Casserole from Getting Watery
To avoid a watery casserole, thaw the frozen hashbrowns completely and pat them dry before folding into the sauce. Thicken the sauce on the stovetop and bake uncovered so steam escapes and the potatoes set into a rich, tender layer.
Storage & Reheating
- Store cooled leftovers in an airtight container in the fridge for 3–4 days. Reheat portions in the oven at 350°F to warm through and keep the topping crisp, or microwave individual servings (the topping will soften).
- To freeze: assemble the casserole without the topping, wrap tightly, and freeze up to one month. Thaw overnight in the fridge, add the topping, and bake as directed.
Recipe FAQs
Do I need thawed hashbrowns for this recipe?
Yes. Thawed hashbrowns help the casserole cook evenly and prevent a soggy or watery final dish.
Can I skip the cornflake topping?
Yes. The cornflake topping is optional. If you prefer a softer, cheesier finish, substitute an additional ¾ cup shredded cheddar instead.
Can I make this dairy-free?
Yes. Use dairy-free milk and dairy-free cheddar alternatives. For the cottage cheese replacement, a blended dairy-free yogurt or dairy-free sour cream gives a similar consistency.
This gluten-free cheesy hashbrown casserole brings savory, comforting flavor to breakfasts, weeknight dinners, and holiday tables.
More Gluten-Free Casseroles
Roasted Veggie Breakfast Casserole (Whole30, Paleo)
Protein French Toast Casserole
Easy Paleo Sweet Potato Casserole
Paleo Creamy Spinach Casserole (Dairy Free)
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Easy Cheesy Hashbrown Casserole
Equipment
- 9×13 inch casserole dish
- Deep 12 inch skillet
Ingredients
- 32 oz frozen hashbrowns
- 2 tbsp olive oil
- 1 onion, finely diced
- 3 cloves garlic, minced
- ¼ cup gluten-free 1:1 flour
- 1 ½ cups milk of choice
- 1 cup chicken broth
- 1.5 tsp salt
- ½ tsp pepper
- 1 tsp garlic powder
- 1 tsp onion powder
- 1 tsp paprika
- ¾ cup cottage cheese, blended until smooth
- 8 oz shredded cheddar cheese
- ¼ cup butter
- 2 cups gluten-free cornflakes (optional)
Instructions
- Preheat oven to 350°F. Spray or grease a 9×13-inch casserole dish.
- In a large, deep skillet, heat olive oil. Sauté onion and garlic until softened.
- Stir in the gluten-free flour to form a paste. Slowly whisk in the milk, then the chicken broth. Add salt, pepper, garlic powder, onion powder, and paprika.
- Whisk constantly over medium heat until thickened, about 3–5 minutes.
- Reduce heat to low and stir in blended cottage cheese and shredded cheddar until smooth and melted.
- Fold in the fully thawed hashbrowns and spread the mixture evenly in the prepared casserole dish.
- In a medium skillet, melt the butter and toast the cornflakes for 3–5 minutes until golden. Sprinkle over the casserole (or top with extra cheddar if preferred).
- Bake for 35–40 minutes until the top is golden and the cheese sauce is bubbling. Let rest briefly, then serve.
Notes
- Topping is optional—swap with ¾ cup extra shredded cheddar for a fully cheesy finish.
- Thaw hashbrowns completely and pat dry to avoid excess liquid.
- Keep the sauce pourable; if it’s too thick, the potatoes won’t absorb flavor.
- Make ahead by assembling and refrigerating up to 24 hours; add topping before baking.
Nutrition
All nutrition facts are estimates and depend on ingredients used. For most accurate results, weigh ingredients and divide by servings.