If you want a dinner that smells amazing, feels like a warm hug, and actually gets eaten without complaints, this French Onion Chicken Bake is it. Juicy chicken smothered in a rich, oniony sauce that everyone loves - serve it with creamy mash, fluffy rice, or buttery garlic pasta and watch it disappear fast.
While you're here, you might also love my cosy Chicken and Mushroom Pie or these hearty oven-baked Chicken Parma Balls for your next dinner rotation.
A Quick Look At The Recipe
✅ Recipe Name: French Onion Chicken Bake
🕒 Ready In: 1 hour 5 minutes
👪 Serves: 8
🍽 Calories: 557 per serve
🥣 Main Ingredients: chicken thighs, French onion soup mix, bacon, chicken stock and sour cream
📖 Dietary Info: nut-free and freezer-friendly
⭐ Why You'll Love It: Creamy, cosy and packed with rich French onion flavour - an easy oven-baked chicken dinner the whole family will happily devour.
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Made this for my twin 6yo boys and they loved it. Super flavoursome, chicken was tender and delicious. Would highly recommend!
- Laurel
French onion-style dinners are everywhere right now, and it's easy to see why. That rich, savoury onion flavour paired with juicy, tender chicken just works every time. This creamy chicken bake delivers big flavor without any complicated steps - easy, cosy, and totally stress-free.
It's also a meal-prep winner. Make it ahead, pop it in the freezer, or enjoy the leftovers the next day (they're even better).
For more delicious dinner ideas, check out my creamy Pesto Chicken Pasta and Chicken Bacon Ranch Bake - both crowd-pleasers that feel just as comforting.
Why You're Going To Love This Recipe
- Big, bold French onion flavour without any fancy steps - just 15 minutes of prep and the oven does the rest
- Family-friendly and budget-wise, with clean plates all round
- Creamy, saucy goodness that's perfect over mash, pasta or rice
- One-pot wonder = less washing up (win!)
- Meal-prep friendly and great for leftovers or popping in the freezer
Jump to:
Chicken Bake Ingredients
Here's what really makes the flavour shine in this dish. The rest of the basic ingredients are listed in the recipe card below - these are just the ones that need a little extra explanation.
Note: Scroll to the recipe card at the bottom for the ingredients quantities and full detailed method.
- Chicken thigh fillets - are my go-to for this recipe, as they stay far juicier and more tender than breast fillets after baking. Cut each thigh fillet in half.
- French onion soup mix - this packs SO much flavour with minimal effort; it's the shortcut that makes this dish taste rich and deep.
- Dijon mustard - just a smidge adds a subtle tang that lifts the whole dish.
- Sour cream - adds creamy, silky richness at the end.
Variations
- Cheesy Twist - sprinkle with grated Gruyère cheese or Swiss cheese for a cheesy top.
- Add Veggies - throw in baby spinach or sliced mushrooms with the sauce for extra nutrition.
- Gluten-Free - swap plain flour for GF all-purpose flour or cornstarch.
- Creamier Sauce - swap half the stock for a splash of cream for an ultra-luxe finish - yummy!
How To Make French Onion Chicken Bake
Use a large oven-proof casserole dish to prepare French onion chicken recipe on the stovetop, then pop it in the oven to bake!
Note: Scroll to the recipe card at the bottom for the ingredients quantities and full detailed method.
- Coat the Chicken - Mix French onion soup mix with flour, toss the chicken thighs in it, and shake off the excess.
- Brown the Chicken - Heat butter + olive oil in a large casserole dish. Cook the chicken in batches (~ 2 minutes on each side until golden brown), then set aside.
- Make Sauce Base - Add bacon, onions, thyme and garlic to the pan. Cook until the onions soften.
- Thicken & Pour - Sprinkle extra flour into the pan, cook for 1 minute, then slowly stir in chicken broth and Dijon - bring to a low simmer.
- Bake Covered - Return chicken thighs to the pan, cover with the lid (or foil) and bake for 20 minutes.
- Finish Baking - Remove the lid and bake another ~30 minutes until the chicken is cooked through. Remove from the oven, stir through the sour cream and spinach leaves (optional), sprinkle with parsley and serve!
Recipe Tips
- Brown in batches - halve the chicken fillets, coat well and then add to pan - don't crowd or the chicken will steam instead of brown!
- Cook your flour - this prevents a raw-flour taste in the sauce.
- Check doneness - when juices run clear (not pink), or internal temp hits 75°C/165°F.
- Veggie boost - stir spinach leaves through the sauce with the sour cream = extra yum.
- Serving pairings - mashed potatoes, rice, pasta or crusty bread all soak up this sauce beautifully.
- Storage - fridge up to 2 days in an airtight container.
- Freezing - freeze (prior to adding sour cream) for up to 1 month.
- Reheat gently - reheat thoroughly, preferably low and slow in the oven and covered to keep chicken pieces juicy.
French Onion Chicken Bake FAQs
Yes, you can, just watch the cooking time as chicken breasts can dry out if overbaked.
Absolutely - bacon always adds extra flavour, but you can leave it out for a lighter version, if you prefer.
The easiest way to check the chicken is cooked is to insert a knife into the thickest part - if the juices run clear (not pink), it's ready. For accuracy, the internal temperature should be 75°C (165°F).
A creamy mash, rice, pasta or a big green salad all pair beautifully with this dish. Add a couple of easy sides and this oven bake will comfortably feed a hungry crowd.
More Chicken Dinner Recipes
Looking for more easy chicken dinners the whole family will love? These favourites are all toddler and kid-approved too!
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French Onion Chicken Bake
Ingredients
- 45 g French onion soup mix
- 3 tbs plain flour
- 1 kg chicken thighs halved
- 30 g (2 tbs) butter
- 2 tbs olive oil
- 300 g shortcut bacon diced
- 1 onion brown or white, diced
- 1 teaspoon dried thyme
- 1 teaspoon minced garlic
- 1 tbs extra plain flour
- 500 ml (2 cups) liquid chicken stock
- 1 teaspoon dijon mustard
- 125 g (½ cup) sour cream
- fresh parsley to serve
Instructions
- Preheat oven to 180 degrees celsius (fan-forced) or 350 fahrenheit.
- Place the French onion soup mix and the plain flour into a large bowl and mix together. Add the chicken thighs and mix to coat. Shake off any excess flour mixture.
- Heat a large and deep casserole dish (that can also go in the oven) over medium-high heat.Add the butter and olive oil. Once melted, brown the chicken (in batches) for approximately 2 minutes on either side. Set aside on a plate. Note: the chicken will still be raw in the centre at this stage.
- Once all of the chicken thighs have been browned, add the bacon, onion, thyme and garlic to the pan and cook for 3-4 minutes or until the onion has softened. Note: if there is excess oil in the dish at this stage, drain it away.
- Sprinkle over the extra 1 tbs plain flour and cook, stirring for 1 minute.
- Slowly add the chicken stock liquid while stirring.Mix through the dijon mustard.
- Return the chicken to the pan and stir.
- Cover with a lid (or foil) and bake for 20 minutes. Remove the cover and cook for a further 30 minutes or until the chicken has cooked through.
- Remove from the oven, stir through the sour cream and serve with fresh parsley and your choice of mashed potato, rice or pasta.
Notes
- Brown in batches - halve the chicken fillets, coat well and then add to pan - don't crowd or the chicken will steam instead of brown!
- Cook your flour - this avoids a raw flour taste in the sauce.
- Check doneness - when juices run clear (not pink), or internal temp hits 75°C/165°F.
- Veggie boost - stir spinach leaves through the sauce when adding sour cream = extra yum.
- Serving pairings - potato mash, rice, pasta or crusty bread all soak up this sauce beautifully.
- Storage - fridge up to 2 days in an airtight container.
- Freezing - freeze assembled (prior to adding sour cream) for up to 1 month.
- Reheat gently - reheat thoroughly, preferably low and slow in the oven and covered to keep chicken pieces juicy.
Jo says
Great recipe highly recommend
Maz says
Delicious. This will definitely be added to the dinner rotation. Peanut gallery piped up with, ‘add mushrooms’ next time.
Lucy says
YUM!
Jessica says
Made this last week and absolutely loved. Subbed the spur cream for Greek yoghurt because that was what I had in the fridge and added some chopped up spinach. Will definitely be making again!
Laurel says
Made this for my twin 6yo boys and they loved it. Super flavoursome (although almost too flavoursome. Might try salt reduced stock next time). Chicken was tender and delicious. Would highly recommend
Lucy says
I'm so thrilled to hear that!