French Onion Funeral Potatoes

French Onion Funeral Potatoes bring together two of my favorite comfort dishes in one golden, bubbly bake. I first whipped this up for a cozy Sunday dinner when I had leftover caramelized onions and a fridge full of potatoes. I wasn’t expecting much just something warm and filling but what came out of the oven was so flavorful and satisfying that my husband asked me to write it down immediately. The crispy topping and creamy, savory interior was just too good to forget.

Over time, this dish has become my go-to when I need something hearty that pleases a crowd. Whether it’s a casual potluck, a holiday buffet, or a meal to take to a friend, these potatoes hit all the right notes. That rich, oniony flavor layered into tender potatoes and melted cheese is something everyone seems to love. It’s comforting, it’s familiar, and it’s always a hit on the table.

Ingredients

Here’s what I use for this recipe. You can always make substitutions if you prefer!

• Russet potatoes – The base of the dish that soaks up all the creamy flavor.
• Yellow onions – Slowly caramelized to build rich, deep onion flavor.
• Butter – Used for sautéing and adding richness to the sauce.
• Garlic – Adds aromatic depth to the caramelized onions.
• All-purpose flour – Helps thicken the creamy base.
• Beef broth – Enhances the savory onion flavor with a deeper note.
• Sour cream – Gives the sauce tanginess and creaminess.
• Heavy cream – Adds richness and makes the sauce extra smooth.
• Shredded Swiss cheese – Melts beautifully and adds a nutty flavor.
• Shredded cheddar cheese – Brings classic cheesy goodness.
• French fried onions – The perfect crispy topping with bold onion flavor.
• Salt and pepper – Seasoning essentials to bring out all the flavors.

Tools You’ll Need

• Large skillet – For caramelizing the onions evenly without burning.
• Medium saucepan – To make the creamy base sauce.
• 9×13-inch baking dish – Holds everything together for baking.
• Cutting board and knife – For slicing potatoes and onions thinly and evenly.
• Whisk – For smooth sauce preparation.
• Spatula or wooden spoon – To stir the onions and sauce.
• Mandoline slicer (optional) – Speeds up slicing and keeps potato slices uniform.
• Oven – For baking the dish to perfection.
• Aluminum foil – Helpful if you want to prevent the top from overbrowning.

Instructions

Step 1: Caramelize the Onions

I start by melting butter in a large skillet over medium-low heat. Then, I add thinly sliced onions and cook them slowly until they’re golden brown and soft. This usually takes 25–30 minutes, but it’s so worth it. I toss in minced garlic during the last few minutes for added flavor.

Step 2: Make the Sauce

In a medium saucepan, I melt a bit more butter and whisk in the flour to make a roux. I cook it for about 1 minute before slowly whisking in the beef broth and heavy cream. I stir constantly until the sauce thickens, then I take it off the heat and stir in sour cream, Swiss cheese, and half the cheddar.

Step 3: Prep the Potatoes

I peel and thinly slice the russet potatoes. I like them about 1/8-inch thick so they cook evenly. If I have my mandoline slicer handy, it makes this step super quick.

Step 4: Assemble the Dish

In a greased 9×13 baking dish, I layer half the sliced potatoes, then half the caramelized onions. I spoon over half of the creamy cheese sauce. Then I repeat the layers with the remaining potatoes, onions, and sauce. I sprinkle the rest of the cheddar cheese on top.

Step 5: Bake

I cover the dish loosely with foil and bake at 375°F for 45 minutes. Then I remove the foil, sprinkle on the French fried onions, and bake for another 15–20 minutes, until golden brown and bubbling.

Step 6: Rest and Serve

I let the dish sit for about 10 minutes before serving. That gives the sauce time to set slightly, making it easier to serve without falling apart.

Tips

If you want to prep ahead, you can assemble the entire dish (minus the fried onions on top), cover it, and refrigerate for up to 24 hours. Add the topping right before baking. I’ve also swapped Swiss cheese with Gruyère when I want an extra luxurious flavor. For a vegetarian twist, use vegetable broth instead of beef broth it still tastes delicious!

Ways to Serve

• Perfect alongside ham or roast beef for holiday dinners.
• As a cozy side dish for weeknight chicken or meatloaf.
• I love it with a crisp green salad to balance the richness.
• It’s even better the next day as leftovers just reheat in the oven or microwave.

Frequently Asked Questions

Can I make French Onion Funeral Potatoes ahead of time?
Yes! Assemble the dish a day in advance and refrigerate. Just bake when ready to serve.

Can I freeze French Onion Funeral Potatoes?
Absolutely. I suggest freezing before baking. Cover tightly and freeze up to 3 months.

What cheese works best for French Onion Funeral Potatoes?
I usually go with cheddar or a blend of cheddar and mozzarella for both flavor and meltiness.

Can I use hashbrowns instead of sliced potatoes?
Yes! Shredded or cubed hashbrowns make it even easier and taste just as delicious.

See You in the Kitchen

I hope you give this French Onion Funeral Potatoes recipe a try! It’s one of those dishes that feels like a warm hug on a plate and is guaranteed to impress at your next gathering. Let me know how it turns out, and don’t forget to save or share it for later!

Happy Cooking!

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