Creamy Mustard Roasted Potatoes

If Creamy Mustard Roasted Potatoes sounds like something you’d order at a “cute little place” and then spend the whole ride home thinking about… good news: you’re about to make them in your own kitchen, in sweatpants, with zero awkward small talk.

These potatoes are the kind of side dish that accidentally becomes the main character. Crispy-roasted baby potatoes + a silky, tangy mustard cream sauce = the “Where has this been all my life?” moment your weeknight dinner needed. And if you’re feeding picky eaters? Just tell them it’s “creamy potatoes.” Mustard doesn’t have to be part of the announcement.

And I’m all about recipes that feel a little fancy but don’t require a cooking degree (or 12 specialty tools). Let’s make some magic.

Why You’ll Love These Creamy Mustard Roasted Potatoes

• Crispy + creamy in one bite. Roasted edges, tender centers, and a sauce that hugs every potato like it pays rent.
• Big flavor, simple steps. Two mustards do the heavy lifting—Dijon for smooth tang, grainy mustard for texture and pop.
• Perfect for busy days. The oven does most of the work while you whip up the sauce in one skillet.
• Works with almost anything. Chicken, salmon, steak, sausage… or honestly, a fork and a quiet corner.

Ingredients You’ll Need

For the potatoes:

• 3 lb (1.36 kg) baby potatoes
• Extra virgin olive oil, as needed
• Kosher salt, as needed
• Pepper, as needed

For the creamy mustard sauce:

• 1 tbsp (14 g) butter
• 1 shallot, finely diced
• 2 garlic cloves, minced
• 1 cup (250 ml) chicken or vegetable broth
• 1 ½ tbsp (22 ml) Dijon mustard
• 1 tbsp (15 ml) grainy mustard
• ¾ cup (175 ml) heavy cream
• 1 ½ tsp (3.5 g) cornstarch
• 2 tsp (10 ml) water
• 1 tsp (5 ml) lemon juice
• 2 tbsp (30 ml) chopped fresh dill, or as needed

How to Make Creamy Mustard Roasted Potatoes

1) Roast the potatoes until golden and irresistible

1. Preheat your oven to 400°F.
2. Add the baby potatoes to a baking sheet.
3. Drizzle with olive oil, then season generously with kosher salt and pepper.
4. Toss everything to coat, then spread the potatoes out so they’re not piled on top of each other (potatoes like personal space).
5. Roast for 35–40 minutes, until browned and tender.

Tip from my kitchen: If your potatoes are on the bigger side, slice them in half before roasting. More surface area = more crispy corners. Crispy corners are basically the reward for being alive.

2) Start the sauce: shallots and garlic first

1. Place a skillet over medium heat.
2. Add butter plus 1 tbsp olive oil.
3. Toss in the diced shallot and sauté 3–4 minutes, until softened.
4. Add the minced garlic and sauté 1 minute more.

At this point, your kitchen will smell like you absolutely have your life together. Even if your laundry situation says otherwise.

3) Simmer with broth + mustards

1. Carefully add the broth to the skillet and bring it to a simmer.
2. Whisk in:
   • Dijon mustard
   • Grainy mustard
   • ½ tsp kosher salt
   • ¼ tsp pepper
3. Let it simmer a few minutes until reduced by about one-third.

That little reduction step is where the flavor concentrates. It’s like the sauce is getting its confidence.

4) Make it creamy, then thicken

1. Add the heavy cream and bring it back to a gentle simmer.
2. In a small cup, mix cornstarch + water to make a slurry.
3. Whisk the slurry into the sauce and cook about 1 minute, until it comes to a boil and thickens.
4. Stir in the lemon juice and taste for seasoning.

If it’s too tangy, add a tiny pinch of salt. If it’s too rich, a little more lemon brightens it. If you “accidentally” eat a spoonful straight from the pan… I saw nothing.

5) Serve like it’s a restaurant side dish

1. In a serving bowl, layer roasted potatoes.
2. Spoon over some sauce.
3. Sprinkle with fresh dill.
4. Repeat 2–3 times until it’s all used up.

This layering makes sure every bite gets the good stuff. Nobody wants to be stuck with the “dry potato zone.”

My Best Tips (So It Turns Out Perfectly)

• Don’t overcrowd the pan. If potatoes are piled up, they steam instead of roast. Translation: less crispy joy.
• Let the broth reduce. If you skip this, the sauce can taste a little “watery.” We want bold and cozy.
• Whisk the slurry well. Cornstarch lumps are like surprise raisins in cookies. Nobody asked for that.
• Use fresh dill if you can. Dried dill is fine in a pinch, but fresh makes the whole dish feel brighter and more “done.”
• Sauce too thick? Add a splash of broth to loosen it. Sauce too thin? Simmer another minute.

And if your sauce looks a little odd for a moment while thickening—don’t panic. It’s just the magic happening.

A Little Story From My Kitchen

The first time I made these Creamy Mustard Roasted Potatoes, I intended them as a side for chicken (because, well… Chicken Magic Recipes and all). But my family did that thing where they “just want to taste” the potatoes… and suddenly the chicken was sitting there like an uninvited guest at its own dinner.

Now I make extra on purpose. Because I’ve learned the hard way: these potatoes do not believe in leftovers.

FAQs About Creamy Mustard Roasted Potatoes

Can I use regular potatoes instead of baby potatoes?

Yes! Yukon Gold works beautifully. Just cut into bite-sized chunks so they roast evenly. Russets can work too, but they’re a bit starchier and less buttery.

Can I make the creamy mustard sauce ahead of time?

You can. Store it in the fridge and reheat gently on the stove. Add a splash of broth or cream while reheating to bring it back to that silky texture.

What can I substitute for heavy cream?

Half-and-half will work, but the sauce will be a bit lighter and slightly less thick. If using milk, you’ll likely need to simmer longer and you may not get the same richness.

How do I store leftovers?

Keep leftover potatoes and sauce in separate containers if possible. Refrigerate for up to 3 days. Reheat potatoes in the oven or air fryer for crispness, and warm the sauce on the stove.

Can I make this vegetarian?

Absolutely—use vegetable broth instead of chicken broth. Everything else stays the same, and it’s still full of flavor.

Bring On the Creamy Mustard Roasted Potatoes

If you need a side dish that feels comforting, a little fancy, and totally doable on a busy day, Creamy Mustard Roasted Potatoes are it. Crispy roasted potatoes plus that tangy, velvety mustard sauce is the kind of combo that makes people hover near the serving bowl like it’s their job.

If you make these, I hope they bring a little extra joy to your table (and maybe a few happy “Mmm!” noises). Because honestly, that’s the real kitchen magic. And yes—Creamy Mustard Roasted Potatoes deserve a permanent spot in your dinner rotation.

Make It a Full Meal (More Cozy Ideas!)

• If you’re serving these Creamy Mustard Roasted Potatoes with chicken, try my chicken and potatoes with Dijon cream sauce—it’s the same cozy, tangy vibe, just with a protein buddy.
• Want a bright, fresh side to balance the creamy sauce? Pair them with roasted garlic kale Caesar salad for that crunchy, garlicky “I totally planned this” dinner energy.
• If you love mustard flavors (hi, same), you’ll also enjoy air fryer honey mustard salmon—fast, flavorful, and perfect for nights when you want something lighter.
• And if you’re feeling extra cozy and want to stay in “comfort food mode,” you can’t go wrong with crockpot chicken and gravy—it’s the kind of meal that makes everyone suddenly find the dinner table.

If you made this recipe, I’d love to hear how it turned out—please leave a star rating (⭐️⭐️⭐️⭐️⭐️) and a quick review so other readers know what to expect (and so I can do a happy little kitchen dance!).

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