Creamy Mustard Roasted Potatoes with Fresh Dill

These creamy mustard roasted potatoes are tender, golden, and tossed in a silky Dijon-grainy mustard sauce with dill. A comforting, flavor-packed side dish perfect for any meal.

Why You’ll Love These Creamy Mustard Roasted Potatoes

Let me just say, these Creamy Mustard Roasted Potatoes have earned a permanent spot on our family table. You know how some recipes sneak up on you? You make them once, just to try something new, and the next thing you know, your kids are asking, “Are you making those mustard potatoes again?” That’s exactly what happened here.

It started on a rainy Tuesday, when I had a bag of baby potatoes and a craving for something cozy. I remembered the mustardy roasted potatoes my mom used to make when we lived in Brussels, simple, buttery, tangy, and I decided to give it my own twist with a creamy mustard sauce and loads of fresh dill. One bite, and I was hooked.

The texture is the dream: golden-crisp outsides, pillowy-soft insides, all wrapped in a silky, tangy sauce that clings to every bite. It’s not just a roasted side dish, it’s the kind of dish you eat straight from the pan when no one’s looking.

If you love my roasted sweet potato rounds, you’ll fall head-over-spatula for these too.

Ingredients You’ll Need

This is one of those recipes that proves simple ingredients, when chosen thoughtfully, can deliver major flavor. Here’s what you’ll need to make these creamy mustard roasted potatoes shine:

• 3 lb baby potatoes
I usually go for a mix of yellow and red-skinned ones. Look for ones that are similar in size so they roast evenly. If they’re a bit dirty, a good scrub does the trick, no need to peel.

• Extra virgin olive oil, as needed
For coating the potatoes before roasting. A light, peppery oil adds great depth.

• Kosher salt, as needed
• Pepper, as needed
Don’t skimp here. Salted potatoes equal flavorful potatoes.

• 1 tbsp butter
Just a bit to start the base of the sauce and give it a touch of richness.

• 1 shallot, finely diced
Shallots give a soft sweetness without overpowering the mustard flavors.

• 2 garlic cloves, minced
Garlic and mustard are like old friends. Trust me.

• 1 cup chicken or vegetable broth
Either one works beautifully. I’ve even used Better Than Bouillon in a pinch.

• 1 ½ tbsp Dijon mustard
This is the smooth heat. I usually reach for Maille or Grey Poupon.

• 1 tbsp grainy mustard
This adds texture and a rustic tang. That pop of mustard seed is so good.

• ¾ cup heavy cream
This is where the sauce gets silky and luscious. Don’t sub with milk, it won’t give the same body.

• 1 ½ tsp cornstarch
• 2 tsp water
A quick slurry thickens the sauce perfectly without making it gloopy.

• 1 tsp lemon juice
Just a touch of brightness to balance all the richness.

• 2 tbsp chopped fresh dill, or more to taste
Fresh dill brings everything to life. I’ll often toss in a little extra right before serving because why not.

Eva’s Note:
The combo of Dijon and grainy mustard is the magic here. The Dijon gives that smooth heat, while the grainy one adds tiny bursts of tang with every bite. I’ve tried it with just one or the other, not the same.

How to Make Creamy Mustard Roasted Potatoes

This recipe comes together in two cozy acts: roast the baby potatoes until golden and crisp, then toss them in a creamy mustard sauce that’s full of flavor and comfort. I like to start the potatoes first, then make the sauce while they roast. It keeps things moving and makes your kitchen smell incredible.

Prep and Roast the Potatoes

1. Preheat your oven to 425°F.
   Line a large baking sheet with parchment paper for easy cleanup.
2. Halve the baby potatoes, or quarter them if they’re large, and pat them dry with a clean towel.
3. Toss potatoes with olive oil, kosher salt, and black pepper until evenly coated. Spread them out cut-side down in a single layer on the baking sheet.
4. Roast for 35 to 40 minutes, flipping halfway through. You’re looking for golden-brown edges and fork-tender centers.

Eva’s Note:
That golden crust on the baby potatoes? Don’t skip it. It gives the creamy mustard sauce something to cling to, and adds the best bite.

Make the Creamy Mustard Sauce

While the potatoes are roasting, start the sauce:

5. Melt the butter in a medium saucepan over medium heat. Add the diced shallot and sauté for 2 to 3 minutes until soft and fragrant.
6. Add minced garlic and stir for about 30 seconds. Don’t let it brown.
7. Pour in the broth, then whisk in the Dijon mustard and grainy mustard. Bring to a low simmer.
8. Stir in the heavy cream and reduce the heat to medium-low. Let it bubble gently for 3 to 4 minutes, stirring occasionally.
9. Make a quick slurry by mixing the cornstarch with cold water in a small bowl until smooth. Slowly whisk it into the sauce.
10. Continue stirring until the sauce thickens slightly. You’re going for silky, not gloopy. Finish with lemon juice and season with salt and pepper to taste.

Eva’s Note:
Don’t rush the sauce. One time I tried multitasking, sauce on and laundry timer beeping, and I turned around to find it curdled. Womp womp. Keep the heat gentle, and swirl in that cornstarch slurry just at the end. It makes all the difference.

Bring It All Together

11. Transfer roasted potatoes to a large bowl or serving dish. Pour the warm creamy mustard sauce over the top.
12. Toss gently to coat every piece, then sprinkle generously with chopped fresh dill. Serve warm, with extra dill on the side for those who love a little more.

Bonus Tip:
These pair beautifully with my melt-in-your-mouth chicken. The creamy mustard sauce plays so nicely with juicy chicken and a side of something green.

Serving Suggestions

These Creamy Mustard Roasted Potatoes are the kind of side dish that quietly steals the show. They fit right in at a cozy weeknight dinner, a holiday spread, or even a fancy brunch. Buttery, tangy, and just a little unexpected.

I still remember the first time I served them for Thanksgiving. Everyone reached for seconds, and my sister-in-law asked if they were “that dill potato thing” I’d made before. That’s when I knew they were a keeper.

Here are some of my favorite pairings:

• Roast chicken or turkey, especially something simple and juicy like melt-in-your-mouth chicken. The sauce just melts in with the meat.

• Grilled salmon or trout. The dill and mustard sauce is a dream with fish.

• Lentil loaf or roasted chickpeas. For a vegetarian option, these make a hearty, grounding side.

• Steamed asparagus or garlic butter green beans. A bright green veggie keeps the plate feeling fresh and balanced.

• Holiday meals. This dish holds its own next to stuffing, cranberry sauce, and all the classics. Comforting but unique, a perfect new tradition.

Make-Ahead & Storage Tips

One of the best things about these Creamy Mustard Roasted Potatoes is that they’re just as friendly to your schedule as they are to your taste buds. Whether you’re prepping for a big holiday dinner or just trying to survive a busy Tuesday, this dish plays nice with make-ahead plans.

Here’s how I handle it when life gets hectic, which is most days:

Make-Ahead Tips

• Roast the potatoes a day ahead. Let them cool completely, then store in an airtight container in the fridge.

• Make the sauce separately. I usually simmer the sauce the night before and keep it in a jar in the fridge.

• Reheat and combine. Warm the sauce gently on the stove, whisking so it gets creamy again. Reheat the potatoes in the oven at 375°F for 10 to 15 minutes to crisp them back up. Then toss together just before serving.

Quick Tip:
If you’re prepping for a crowd, assemble everything in a baking dish, cover, and reheat at 350°F until hot and bubbly. It makes hosting way less stressful.

Storing Leftovers

• Store leftovers in the fridge for up to 3 days.

• Reheat in a skillet or 350°F oven. The sauce thickens slightly after chilling but still tastes amazing.

Leftover Love

• Toss cold leftovers into a breakfast hash with eggs.

• Warm them and top with a fried egg for the easiest brunch ever.

• Chop them into a grain bowl with greens, lentils, and extra mustard drizzle.

These make excellent meal prep potatoes for the week. Satisfying, flavorful, and versatile.

Variations to Try

Once you’ve made Creamy Mustard Roasted Potatoes a few times, and you will, it’s fun to play around with the flavors depending on the season, your mood, or just what you’ve got in the fridge. This base recipe is super adaptable, a blank canvas for bold or subtle tweaks.

Here are a few tried-and-true variations from my own kitchen adventures:

• Herb Swap:
Don’t have fresh dill? Try chopped parsley, chives, or tarragon. Tarragon adds a faint licorice note that’s especially good with fish.

• Spicy Kick:
Add a pinch of crushed red pepper flakes to the sauce, or stir in a teaspoon of horseradish for heat that hits the back of your throat in the best way.

• Vegan Version:
Use plant-based butter, a good unsweetened oat cream, and veggie broth. It won’t be as rich, but it’ll still be cozy and delicious.

• Mustard Twist:
Want it extra tangy? Use whole grain mustard only, or bump up the Dijon to 2 tablespoons for sharper flavor.

• Cheesy Finish:
Grate a little Parmesan over the top before serving. It’s not traditional, but goodness, it works.

Eva’s Note:
Once, in the middle of a sleepy Sunday, I added leftover roasted carrots to the mix. Total accident. Total win.

Frequently Asked Questions about Creamy Mustard Roasted Potatoes

Q: What’s the best mustard to use for mustard roasted potatoes?
Answer: A combination of Dijon mustard and grainy mustard gives the best flavor balance. Smooth, creamy heat from the Dijon and rustic tang from the grainy kind. I’ve tested it with just one, and it’s never quite the same.
Eva’s Note: I always sneak a spoonful of the sauce straight from the pan with my finger, just to check the seasoning.

Q: Can I make creamy mustard potatoes ahead of time?
Answer: Yes. These are perfect for prepping in advance. Roast the potatoes and make the sauce separately, then combine and reheat gently on the stove or in the oven before serving.
Eva’s Note: I often assemble them in a baking dish the night before a family dinner, then just warm them up while the kids are setting the table.

Q: What main dishes go well with creamy mustard potatoes?
Answer: These potatoes love company. Pair them with roasted or pan-seared chicken, grilled salmon or trout, or even a savory lentil loaf. The creamy mustard sauce brings a rich, flavorful contrast to lean proteins.
Eva’s Note: One weeknight, I served them with leftover grilled chicken and a salad, and my husband said it felt like a restaurant meal. Sometimes it really is the side dish that makes dinner feel special.

Q: How do I keep the mustard sauce from curdling?
Answer: Keep the heat medium-low when adding the heavy cream, and stir constantly when the cornstarch slurry goes in. That gentle heat is key.
Eva’s Note: I learned the hard way one rushed evening. I cranked the heat too high, the sauce split, and I had to start over. Now I keep the flame low and slow and never walk away mid-simmer.

And that’s the whole scoop on Creamy Mustard Roasted Potatoes, from the crispy golden baby potatoes to that silky, tangy, dill-flecked sauce that turns a simple side into a standout. I hope you’ll try them soon, and often.

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