French Onion Ground Beef and Rice Casserole

French onion ground beef and rice casserole served in a baking dish.
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My strongest belief in the universe — besides the urgent moral imperative of using real butter — is that the French Onion Ground Beef and Rice Casserole deserves a standing ovation, with slow claps and maybe a tiny brass band. I’ll fight you on this. Comfort food? Sure. Life-affirming? Absolutely. Two-word verdict: soul hugs.

How I single-handedly destroyed Thanksgiving but learned a casserole truth


Once upon a Midwest Thanksgiving (yes, the one with the weird cranberry Jell-O and my aunt’s aggressive green bean casserole), I tried to flambé something. Spoiler: flambéing is not a verb you should attempt while narrating your family’s childhood trauma. The turkey survived, barely; my pride did not. I learned that day that casseroles are honest — they don’t require flair, just patience, layering, and the willingness to accept that your socks might never match again.

Also, before I forget (because I will), this casserole is the cozy cousin to other weeknight heroes — like that creamy beef and shells that I absolutely text my neighbor about during a blizzard. Not that I’d ever brag. Promise.

Okay, pivot: here’s why you should make this immediately


ANYWAY — before I emotionally relive the lemon bar debacle of 2019 (let’s never speak of it), this dish is the pivot of my dinner rotation. It’s forgiving, loud on flavor, and sneaks vegetables past people who are otherwise very stubborn (ahem, my husband). Also? It reheats like a dream, which is crucial when you’re juggling life, three streaming subscriptions, and existential dread.

Ingredients (because we need groceries, not drama)

  • 1 lb ground beef
  • 1 cup long-grain white rice (uncooked)
  • 1 packet French onion soup mix
  • 2 cups beef broth
  • ½ cup sour cream
  • 1 ½ cups shredded mozzarella or Swiss cheese
  • ½ cup French-fried onions

Mini-rants and shopping notes: Trader Joe’s has a weirdly excellent jarred caramelized onion spread that I’m not above using when I’m being lazy; Aldi’s beef is a steal if you’re trying to stretch a paycheck; yes, you can splurge on fancy Swiss but mozzarella melts like a dream and nobody will judge (except maybe my Aunt Karen, who judges everything). Also, don’t buy pork-based onion toppers — insult to my casserole and to your dietary choices.

Cooking Unit Converter (because cups confuse me on Sundays)


A quick little helper if you want metric or ounces instead of the Midwest cup-slang.

Technique breakdown: how I bumbled my way to success (and you will too)


I talk like I cook: fast, loud, and with three emotional side-eyes. Here’s the vibe — brown the beef until it sings a little, mix the rice in like you mean it, and do not forget to cover while it bakes because dried-out casserole is tragedy. Here’s what I learned the hard way (and what saved Thanksgiving when the stuffing caught on a minor spiritual fire):

  • Preheat the oven to 350°F (175°C) and grease a 9×13-inch baking dish.
  • In a skillet over medium heat, brown the ground beef and drain excess grease. Season with salt, pepper, and garlic powder.
  • In a large bowl, mix uncooked rice, French onion soup mix, and beef broth until well combined.
  • Stir in the cooked ground beef and sour cream until fully mixed.
  • Transfer the mixture to the prepared baking dish and top with shredded cheese.
  • Cover with foil and bake for 40 minutes. Remove foil and bake an additional 10-15 minutes until cheese is bubbly.
  • Sprinkle French-fried onions on top and bake for another 5 minutes until golden brown.

Sensory notes: you want the cheese bubbling like it’s about to tell you a secret; the rice should have softened into a plush, slightly creamy bed; the French-fried onions will add that glorious, shameful crunch.

Why this casserole actually matters to me (and probably to your grandma too)


Cooking is how my family talked without having to say mushy things; it’s the language of casseroles and casseroles are the dialect of comfort. When I make this, I’m calling my mom in my head, reminding myself of picnics, rainy Sundays, and the one neighbor who always brought extra napkins (bless them). Food sticks to identity — to rituals and to people who show up with lasagna pans and bad jokes.

Also, PS: this recipe taught me that a packet mix + sour cream = domestic alchemy. Keep that secret to yourself unless you want every weekend potluck to forever expect miracles from you.

A tiny, loud anecdote (micro but spicy)


I once tried to photograph this casserole for Instagram and set off my smoke detector because I forgot I’d sealed the foil tight. My feed got a smoky filter for free and my husband clapped because alarms are apparently his love language.

Frequently Asked Questions (the chaotic corner where I answer like a sleepy friend)


Can I swap turkey or chicken for the ground beef? +

Sure, but I’ll glance at you with mild suspicion (kidding). Ground turkey works, but you may want extra seasoning and a splash more fat — turkey can be as shy as my high school crush at a reunion.

Do I need to pre-cook the rice? +

Nope! The recipe uses uncooked long-grain rice and bakes it in the casserole — that’s the magic. Don’t be tempted to over-boil beforehand unless you enjoy soggy surprises.

Can I make this ahead and freeze it? +

Yes — assemble it in a freezer-safe dish, wrap tightly, and bake from frozen but add 15–20 minutes. Thaw overnight if you can; your future self will thank you profusely (and maybe send you a casserole emoji).

Okay, I’ll stop talking now. This recipe is reliable, forgiving, and practically a hug in baking dish form — make it when life is chaotic, when it’s calm, when you need to impress someone without actually trying. You’ll thank me, and if you don’t, I accept complaints via interpretive dance.

Daily Calorie Needs Calculator (for the curious, not the guilty)


Use this quick tool if you want to estimate how many calories your serving contributes to your day.

French onion ground beef and rice casserole served in a baking dish.

French Onion Ground Beef and Rice Casserole

This cozy casserole combines ground beef, rice, and a flavorful blend of French onion soup mix and sour cream, making it a comforting weeknight dinner option that reheats beautifully.
Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: American
Calories: 420

Ingredients
  

Main Ingredients
  • 1 lb ground beef Use lean ground beef for a healthier option.
  • 1 cup long-grain white rice (uncooked) Do not pre-cook the rice.
  • 1 packet French onion soup mix Any brand will work.
  • 2 cups beef broth Use low-sodium for a lighter dish.
  • ½ cup sour cream Can substitute with Greek yogurt for a healthier option.
  • cups shredded mozzarella or Swiss cheese Mozzarella melts nicely.
  • ½ cup French-fried onions For topping, adds crunch.

Method
 

Preparation
  1. Preheat the oven to 350°F (175°C) and grease a 9×13-inch baking dish.
  2. In a skillet over medium heat, brown the ground beef and drain excess grease. Season with salt, pepper, and garlic powder.
  3. In a large bowl, mix uncooked rice, French onion soup mix, and beef broth until well combined.
  4. Stir in the cooked ground beef and sour cream until fully mixed.
Baking
  1. Transfer the mixture to the prepared baking dish and top with shredded cheese.
  2. Cover with foil and bake for 40 minutes.
  3. Remove foil and bake an additional 10-15 minutes until cheese is bubbly.
  4. Sprinkle French-fried onions on top and bake for another 5 minutes until golden brown.

Notes

This casserole is forgiving and can be made ahead and frozen. You can swap turkey or chicken for the ground beef if desired.

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