My Debut Cookbook 'Comfy' Is Out Now. ORDER HERE!
Potato/ Roast Dinner/ Sides

Mustard Mash

October 17, 2019 (Last Updated: December 25, 2023) by Chris Collins

This Mustard Mash is the perfect way to spruce up a simple mashed potato. The perfect no fuss side dish!

spoon digging into mustard mash with melted butter on top

Mash with Mustard

Honestly, mashed potatoes and mustard is a match made in heaven. I mean mashed potatoes by themselves are great, but if you’re a regular reader of mine you’ll know I like to take things a step further.

Mustard Mash Ingredients

  • Potatoes
  • Butter
  • Cream (or milk)
  • Dijon Mustard
  • Wholegrain Mustard

I definitely recommend using the two different mustards, as they both bring something unique to the mash. The dijon adds that classic mustard flavour, without being as overpowering as something like hot English mustard, whilst the wholegrain adds a nice bit of texture.

boiled potatoes with butter in black pop on chopping board

How to make Mustard Mash

It really is as simple as popping your spuds in cold water and bringing to the boil until knife tender. Drain and mash with butter, then stir in cream and mustards. From there I always pour melted butter over the top just before serving, just because why the heck not?!

Top Tip – Be sure to season this mash, season again, then season some more. There’s nothing worse than bland mash, so be sure to bring out the best with a hefty pinch of salt in the water for boiling and when mashing. I always use salted butter for this reason.

Make Ahead Mustard Mash

You can of course make this mustard mash ahead of time. Just allow to cool, then cover in the fridge for 2 days without the melted butter.  Either bring to room temp and reheat in the microwave (mixing a couple of times) or add a splash of cream/milk and stir over medium heat in a pot. Serve with melted butter.

overhead shot of mustard mash with spoon diving in

Serving Mustard Mash

So that’s it! No fuss mashed potatoes taken to new heights of flavour. Here’s what I love to serve this mash with:

Hey, whilst you’re here why not check out my other recipes?

Easy Potato Sides

Alrighty let’s tuck into this mustard mashed potatoes shall we?!

mash potato served with chicken and green beans with salt and pepper blurred in background

How to make Mustard Mash (Full Recipe & Video)

spoon digging into mustard mash with melted butter on top

Mustard Mash

This Mustard Mash is the perfect way to spruce up a simple mashed potato. The perfect no fuss side dish!
5 from 5 votes
Print Pin Rate Share by Text
Servings (click & slide): 5
Course: Side Dish
Cuisine: British
Prep Time: 10 minutes
Cook Time: 15 minutes
Total Time: 25 minutes
Calories per serving: 326kcal
Cost per serving: £1 / $1


  • Large Pot
  • Potato Masher
  • Sharp Knife & Chopping Board
  • Potato Peeler
  • Small Potato (for melting butter)
  • Serving Dish

Ingredients (check list):

  • 2lb / 1kg White Potatoes
  • 1/2 cup / 125ml Cream or milk, or to preference
  • 4 tbsp Butter, at room temp
  • 1 tbsp Butter, melted
  • 2 tsp Dijon Mustard, or to taste
  • 2 tsp Wholegrain Mustard, or to taste
  • Salt & Black Pepper, to taste


  • Peel and dice your potatoes into small chunks. Pop in a pot of cold salted water and bring to a boil. Cook until knife tender (10-15mins). Drain, don't rinse.
  • Mash with 4 tbsp butter until smooth. Stir in cream until desired texture, then add 1 tsp each of dijon/wholegrain mustard. If you want it more 'mustardy' stir through the 2nd two. Season to taste.
  • Transfer to a serving bowl and pour over your final tbsp of melted butter.

Quick 1 min demo!


a) Seasoning - Bring out the best in this simple mashed potato by seasoning, seasoning more, then seasoning again. I'll usually go for salted butter for this reason, but feel free to sub unsalted butter if that's all you have.
b) Wholegrain Mustard -  I do strongly recommend using the two different mustards as they both bring s little something different to the table. The wholegrain adds a nice texture to the mash, whilst the dijon adds that classic mustard flavour.
c) Make Ahead - Feel free to make this ahead of time! Just leave off the final drizzle of butter and cover in the fridge. I usually bring to room temp before I microwave so it warms through more evenly. You can also add a splash of cream/milk and stir over medium heat in a suitably sized pot.
d) Calories - based on using 1/2 cup heavy cream and unsalted butter. Divided by 5.

Your Private Notes:


Nutrition Facts
Mustard Mash
Amount Per Serving
Calories 326 Calories from Fat 152
% Daily Value*
Fat 16.93g26%
Saturated Fat 10.335g52%
Polyunsaturated Fat 0.712g
Monounsaturated Fat 4.846g
Cholesterol 47mg16%
Sodium 129mg5%
Potassium 1021mg29%
Carbohydrates 39.14g13%
Fiber 4g16%
Sugar 3.48g4%
Protein 4.91g10%
Vitamin A 610IU12%
Vitamin C 23mg28%
Calcium 43mg4%
Iron 1.39mg8%
* Percent Daily Values are based on a 2000 calorie diet.
Nutrition is based on the absence of salt unless stated as a measurement in the ingredients. Cost is worked out based on ingredients bought from UK supermarkets, then divided by the number of servings. In both instances these values are just for guidance. Please check out my FAQ Page for more info.
Tried this recipe?Show me how you got on by tagging @dontgobaconmyheart_ on IG and #dontgobaconmyheart
Looking for more?You'll find plenty more delicious comfort food like this in my Debut Cookbook 'Comfy'

If you loved this Mustard Mash recipe be sure to pin it for later! Already made it or got a burning question? Give me a shout in the comments and pick up your free ecookbook along the way!





Leave a Reply

Recipe Rating


  • Reply
    October 18, 2019 at 10:49 pm

    5 stars
    What a great recipe! This looks absolutely scrumptious and so perfect for the holidays!

    • Reply
      Chris Collins
      October 19, 2019 at 6:49 pm

      Thanks, Kim 🙂

  • Reply
    October 18, 2019 at 8:07 pm

    5 stars
    We usually serve the mustard as a grab it yourself sauce if you need it, but your idea of incorporating the mustard (2 of them!) directly into the mash itself sounds really neat.

    • Reply
      Chris Collins
      October 19, 2019 at 6:49 pm

      Thanks, Anita 🙂

  • Reply
    Kelly Anthony
    October 18, 2019 at 7:33 pm

    5 stars
    What a great idea to add mustard to mashed potatoes. Looking forward to adding a new flavor to one of my favorite side dishes.

    • Reply
      Chris Collins
      October 19, 2019 at 6:49 pm


  • Reply
    October 18, 2019 at 7:29 pm

    5 stars
    I LOVE the idea of adding whole grain mustard to this mash – mustard and potatoes go so well together!

    • Reply
      Chris Collins
      October 19, 2019 at 6:48 pm

      They sure do!