Whole Grain Mustard Mashed Potatoes are creamy, buttery mashed potatoes made with coarse whole grain Dijon mustard for a rich, savory side dish with a satisfying tang. Serve with Roasted Vegetable Wellington and Stovetop Brussels Sprouts for a complete meal.
One Ingredient Changes Everything
I like this dish because the whole-grain mustard adds bold, tangy flavor and a subtle pop of texture, making these mashed potatoes genuinely interesting without complicating the recipe. The rest of the ingredient list is pure classic mashed potato – Yukon Golds, butter, milk, salt, and pepper. The contrast is exactly what makes the recipe work.
Ingredients for Whole Grain Mustard Mashed Potatoes
Here’s what you will need. Exact amounts are listed in the recipe card below.
- Yukon Gold potatoes – Ideal for their naturally creamy, buttery texture. Russet potatoes can be substituted, but will produce a fluffier, slightly drier result.
- Butter – For richness and classic mashed potato flavor. Vegan butter works beautifully here.
- Milk – Loosens the potatoes to a smooth, creamy consistency. For a vegan version, a mild plant milk such as oat milk or unsweetened almond milk works well.
- Whole Grain Dijon mustard – The star of the dish. Coarse whole grain mustard adds bold, tangy flavor.
- Kosher Salt and Ground Black Pepper – Simple seasonings to bring it all together.
How to Make Whole Grain Mustard Mashed Potatoes
STEP ONE: Boil the Potatoes. Place the potatoes in a large pot and add enough cold water to cover by about 1 inch. Bring to a boil over high heat, then reduce to medium and cook until fork-tender, about 12 to 15 minutes. Drain and return the potatoes to the pot.
STEP TWO: Mash and Season. Add the butter, milk, mustard, salt, and pepper. Mash to your desired consistency, adjust seasoning to taste, and serve hot.
Frequently Asked Questions
Can I use smooth Dijon mustard instead of whole grain?
Yes. Smooth Dijon delivers a similar tangy flavor with a more uniform consistency. Whole grain is worth seeking out though; the texture it adds is part of what makes this dish distinctive.
Can I make these ahead of time?
Yes. Store in an airtight container in the refrigerator for up to 3 days. Reheat on the stovetop over low heat with a small splash of milk or butter to restore creaminess.
Can I add more mustard for a stronger flavor?
Absolutely. Start with an extra teaspoon, mash, and adjust from there.
Recipes That Pair Well
- Glazed Corned Seitan Roast – Homemade seitan with a sweet mustard glaze, perfect for St. Patrick’s Day.
- German Style Carrot Dogs – Pan-charred carrots on pretzel buns with spicy brown mustard and sauerkraut, a natural fit for Oktoberfest.
- Easy Cauliflower Steaks – A simple, satisfying main ready in under 30 minutes.
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Whole Grain Mustard Mashed Potatoes Recipe
Ingredients
- 2 pounds Yukon Gold potatoes cubed
- 1/2 cup butter
- 1/4 cup milk
- 1/4 cup whole grain Dijon mustard
- kosher salt to taste
- ground black pepper to taste
Instructions
- Place the potatoes in a large pot and add enough cold water to cover by about 1 inch. Bring to a boil over high heat, then reduce to medium and cook until fork-tender, about 12 to 15 minutes. Drain and return the potatoes to the pot.
- Add the butter, milk, mustard, salt, and pepper. Mash to your desired consistency, adjust seasoning to taste, and serve hot.
Nutrition
This post was updated on March 3, 2026.
Nina - Edamommy4life
What a genius idea to add mustard to mashed potatoes! I get bored of gravy. I made this to pair with your twice baked BBQ tofu bites like you suggested. I left out the butter and added a little more milk. So good!
Andrea
love these mashed potatoes and how delicious they turned out! such a great flavor!
Katie
These potatoes are so so so delicious! I love this recipe!
nancy
love the subtle mustard flavours that isn’t too overwhelming ! So fluffy – it is the perfect side!
Ana
The whole grain dijon mustard takes these mashed potatoes to a whole new level! I’ve never had it like this before and really loved the flavor.