Oven Baked Buttermilk Roast Chicken (Whole)

This Buttermilk Roast Chicken is one of the easiest ways I know to get a whole roast chicken that's deeply seasoned, juicy inside and beautifully golden outside.

The chicken is marinated overnight in a salty buttermilk brine with garlic and herbs, then roasted whole in the oven.

That's pretty much it.

The first time I made this was for Christmas dinner — and there wasn't a morsel left for me to taste.

So now I know better.

Carve first. Reserve your piece. Then invite everyone else to the table.

The buttermilk does most of the work here. It tenderizes and seasons the chicken while it sits in the fridge, which means you need very little hands-on work the next day.

And if you're making this for a holiday dinner, add some small potatoes around the chicken. They roast in all those chicken juices and, frankly, sometimes cause more arguments at our table than the chicken itself.

If you're looking for a more heavily spiced version, my Whole Chicken Roast Indian Style uses yogurt, Indian spices and ghee instead of the buttermilk brine.

The two recipes use a similar whole-chicken roasting technique but taste completely different.

Buttermilk Roast Chicken Recipe

This is a whole buttermilk chicken that's marinated before roasting rather than fried.

The overnight buttermilk marinade helps season the chicken all the way through while keeping the meat tender and juicy.

You'll need only a handful of ingredients:

• Whole chicken
• Buttermilk
• Garlic
• Herbs
• Paprika
• Onion powder
• Salt

Then it's essentially:

Marinate → Pat Dry → Roast → Rest.

For the best flavor, I prefer marinating the chicken overnight and roasting it the next day.

Why Brine Chicken in Buttermilk?

If you've ever roasted a chicken that somehow managed to be dry and bland, this is the exact opposite.

The buttermilk marinade helps season the chicken while it sits in the fridge and keeps the finished meat tender and juicy.

It's a technique that feels very familiar to me because yogurt-based marinades are used so often in Indian cooking.

We routinely marinate chicken and mutton in yogurt with spices before cooking them.

Buttermilk works on a similar principle here — only this time we're using it to make a classic whole roast chicken.

What Does Buttermilk Do to Chicken?

Buttermilk is mildly acidic, which helps tenderize the chicken while it marinates.

More importantly for this recipe, the salty buttermilk mixture acts as a brine.

It gives the salt, garlic and herbs plenty of time to season the chicken before it ever goes into the oven.

That is why this buttermilk chicken doesn't rely on adding lots of seasoning after roasting.

The work happens while you sleep.

My kind of cooking.

Ingredients

Here are the ingredients needed to make this gorgeous buttermilk brined chicken

• Whole Chicken
• Buttermilk
• Garlic Powder
• Onion Powder
• Paprika
• Herbs
• Lemon
• Salt

Additional- Small potatoes or any other root vegetable

Chicken

I used a 2.5-pound whole chicken with the skin on for this recipe.

A smaller chicken works particularly well because it cooks relatively quickly and evenly while staying tender.

Chicken size matters here.

If you use a much larger bird, don't rely only on the cooking time given in the recipe — use a meat thermometer to check when it's done.

Keep the skin on while roasting even if you don't plan to eat it. It helps protect the meat and keeps the chicken moist.

Buttermilk

Use store-bought cultured buttermilk if you have it.

If you don't have buttermilk, you can use plain yogurt thinned with water as a substitute.

Whisk the yogurt until smooth and add enough water to create a pourable consistency.

The important thing for this recipe is that there is enough liquid to coat the chicken well while it marinates.

You do not necessarily need several liters if you're using a snug zip-lock bag — the closer the marinade stays around the chicken, the less liquid you need.

Herbs

The buttermilk will carry the flavor inside the chicken. I like to add all kinds of herbs here. Any of the following herbs alone or in combination will work well

• Parsley
• Cilantro or coriander
• Rosemary
• Thyme
• Oregano
• Chives
• Sage

You can use fresh or dried. For this recipe fresh would work better.

Here is a simple equation to substitute fresh herbs with dried herbs or vice versa

1 part of dried herbs = 3 parts of fresh herbs

Keep this in mind while substituting.

Garlic

You can use fresh or dried powdered garlic. Dried garlic powder is most convenient and easy to use.

If using fresh garlic, chop it up so that it can release the oils in the buttermilk.

If you're a garlic person too, try my Air Fryer Roasted Garlic. It turns soft, mellow and caramelized in about 25 minutes and is brilliant in mashed potatoes, breads and holiday sides.

Salt

Salt is important because this isn't just a marinade — it's also a buttermilk brine.

The chicken sits in the seasoned buttermilk for several hours, giving the salt time to season the meat.

Most of the marinade is discarded, so the amount of salt in the brine should not be confused with the amount you actually eat.

Lemon

I like to pierce a lemon couple of times and stuff it inside the chicken. It cooks from inside and releases both aroma and the juice into the chicken.

Plus it smells heavenly!

You can also use lime here.

Additional Fat

I have left out any additional fat here except a drizzle of oil for the potatoes.

The chicken skin and buttermilk have enough fat to make this chicken fantastic. It really doesn't need anything else.

Roasting Root Vegetables

I love this by product of making roast chicken. You can use small potatoes or carrots.

I love adding halved new potatoes to the sides of the roast. They soak up the juices and the fat that the chicken releases.

Once the chicken is done, I roast the potatoes for an additional 20 minutes so that they get extra crispy.

I am not kidding but I and my husband literally fight over these potatoes! So make them! They are so rewarding!

If you're serving this chicken for Christmas or a family dinner and want a separate potato side instead, try my Crispy Air Fryer Smashed Potatoes with Rosemary & Garlic or Instant Pot Garlic Mashed Potatoes.

Equipment Needed

Naturally ,you will need an oven ,big enough to bake the chicken. In addition to this, you will need a zip lock bag and a tall container. I have used the inner pot of my small 3 Qts instant pot.

The chicken has to be submerged in the brine completely.Keep the bag inside a container while it marinates so it stays upright and any accidental leaks are contained. You'll also need a roasting pan, baking dish or cast-iron pan large enough to hold the chicken.

How to Buttermilk Brine Chicken

Combine the buttermilk, salt, garlic, herbs and seasonings in a large zip-lock bag.

Add the whole chicken and massage the bag gently so the marinade coats the chicken on all sides.

Place the sealed bag inside a container and refrigerate.

Marinate for at least 6 hours and preferably overnight, around 12–24 hours.

You have to give buttermilk time to work its magic. That's literally the only catch of this recipe. Time!

Do You Rinse Chicken After Brining in Buttermilk?

No.

Remove the chicken from the marinade and allow the excess buttermilk to drip off.

Discard the remaining marinade.

Then pat the outside of the chicken dry with paper towels.

This is important because a drier surface gives you much better browning and crispier skin in the oven.

There is no need to rinse the chicken.

Can You Freeze Buttermilk Marinated Chicken?

Yes.

You can freeze the chicken in its marinade inside a freezer-safe bag.

Thaw it completely in the refrigerator before cooking.

Once thawed, remove the chicken from the marinade, pat it dry and continue with the roasting instructions.

How to Make Buttermilk Roast Chicken

Prepare the Chicken for Roasting

Remove the chicken from the buttermilk marinade and discard the marinade.

Let the excess liquid drip away, then pat the chicken thoroughly dry.

Don't skip the drying step.

Moisture left on the skin makes it much harder for the chicken to become golden and crisp.

Place it in your roasting pan or cast-iron skillet.

Tie the legs together if you like, although I usually don't bother when I'm using a smaller chicken.

Add Potatoes — Optional but Highly Recommended

This step is completely optional but like I said on top, i just love the chickeny crispy roast potatoes. I confess...almost more than the chicken itself.

All you have to do is halve them, toss them with olive oil and salt. Tuck them around the chicken.

I also use them to cover the wings so that they don't burn or overcook.

Roast the Chicken

Preheat the oven to 200°C / 400°F.

For my smaller chicken, I start checking after around 50 minutes.

Rotate the roasting pan during cooking so the chicken browns evenly.

If the skin becomes too dark before the chicken is cooked through, loosely tent that area with foil.

A small chicken will usually take around 50–70 minutes, but chicken size varies considerably.

Use temperature — not just time — to decide when it's done.

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How Do You Know When Roast Chicken Is Done?

Use a food thermometer.

The thickest part of the chicken should reach at least:

165°F / 74°C

before serving.

Insert the thermometer into the thickest part without touching bone.

Cooking time is useful as a guide, but the internal temperature is what tells you when the chicken is safely cooked.

REMOVE the clear-juices method as your primary test.

Tips for Juicy Buttermilk Roast Chicken

Marinate overnight
Give the buttermilk brine time to season the chicken.

Pat the chicken dry
This is essential for golden skin.

Use a meat thermometer
Chicken size varies, so don't rely on cooking time alone.

Use foil if needed
If one area is browning faster than the chicken is cooking, loosely tent it with foil.

Try spatchcocking
If you want faster, more even cooking, remove the backbone and flatten the chicken before roasting.

Rest Before Carving

Once the chicken reaches the correct internal temperature, remove it from the oven and let it rest for about 15 minutes before carving.

Resting gives the juices time to settle back into the meat instead of running straight onto your cutting board.

Storing Leftover Roast Chicken

Store leftover roast chicken in an airtight container in the refrigerator for 3–4 days.

I usually remove the meat from the bones and store it shredded because it takes up less space and is easier to use.

You can add it directly to soups, salads, sandwiches or pasta.

You can also freeze the cooked chicken.

My favorite way is to freeze it shredded in smaller portions so I can thaw only what I need.

POSSIBLE VARIATIONS

Once you have your roast chicken game down, I am sure you will be ready to experiment!

Here are some more twists to your roast chicken

• Fill the chicken with semi cooked rice. Imagine how delicious the rice cooked with the chicken juices will be!
• Remove the Brine and season the chicken with a BBQ rub.
• Change up the marinade with other spices like garam masala, peppercorns, nutmeg, cinnamon.
• Also switch up the herbs.

What to Serve with Buttermilk Roast Chicken

This buttermilk roast chicken works just as well for a Sunday roast as it does for Christmas dinner or a family gathering.

If I'm serving it for a holiday meal, I like to keep the sides fairly simple because the chicken already brings plenty of flavor.

For a classic roast dinner, serve it with Instant Pot Garlic Mashed Potatoes and Honey Garlic Glazed Carrots.

For something crispy, these Air Fryer Smashed Potatoes with Rosemary & Garlic are especially good because they don't need oven space.

And for Thanksgiving or Christmas, add my Instant Pot Cranberry Sauce for something sharp and tangy alongside the rich roast chicken.

Honestly, chicken + potatoes + carrots + cranberry sauce is a fairly difficult combination to complain about.es.

More Chicken Recipes

If you want another whole roasted chicken, try my Whole Chicken Roast Indian Style — it's made with yogurt, ghee and Indian spices instead of buttermilk.

For something much quicker, my Instant Pot Salsa Chicken is one of my easiest chicken dinners and particularly useful for meal prep.

And if you want an easy oven-baked option, try my Lemon Pepper Chicken Drumsticks — juicy chicken with plenty of lemony, peppery flavor and much less work than roasting a whole bird.

Frequently Asked Questions

How long should you marinate chicken in buttermilk?

I prefer to marinate a whole chicken overnight.

Around 6–24 hours gives the buttermilk brine plenty of time to season the chicken.

Do you rinse buttermilk off chicken before cooking?

No.

Let the excess marinade drip away, discard the marinade and pat the chicken dry before roasting.

Why do you marinate chicken in buttermilk?

The mild acidity helps tenderize the meat, while the salty marinade seasons the chicken as it sits.

The result is a juicy, well-seasoned roast chicken.

Can you roast chicken after marinating it in buttermilk?

Absolutely.

Buttermilk chicken isn't only for frying.

Remove the chicken from the marinade, pat it dry and roast it in a hot oven until golden and the internal temperature reaches 165°F / 74°C.

Can you freeze buttermilk marinated chicken?

Yes.

Freeze the chicken in the marinade in a freezer-safe bag, then thaw completely in the refrigerator before cooking.

What size chicken works best for this recipe?

I prefer a smaller whole chicken around 2.5–3 pounds.

Larger chickens will need longer in the oven, so always use internal temperature rather than cooking time alone.

Using a Larger Chicken

I used a 2.5–3 lb / 1.1–1.4 kg chicken for this recipe.

If your chicken is larger, it will simply need more time in the oven.

Use the recipe time as a starting point and check the chicken with a meat thermometer rather than relying only on the clock.

The chicken is ready when the thickest part reaches 165°F / 74°C.

As a rough guide:

• 2.5–3 lb / 1.1–1.4 kg: start checking around 50 minutes
• 4–5 lb / 1.8–2.3 kg: start checking around 65–70 minutes
• 5–6 lb / 2.3–2.7 kg: start checking around 80 minutes

Ovens and chicken shapes vary, so internal temperature is more reliable than cooking time alone.

If you tried making this delicious buttermilk brined chicken, do leave me a note in the comments. I would love to hear your thoughts!

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