Peel and chop 500 g Potatoes. Add them to a pan of cold, salted water and bring to the boil. Reduce to a simmer and cook for 12-15 minutes.
Drain and return to the pan. Mash to your desired consistency.
Add 50 g Butter, 50 ml Milk, 1 pinch Sea salt and black pepper, 1 teaspoon Dijon mustard and 1 teaspoon Wholegrain mustard. Mix well to combine.
Notes
For the creamiest mashed potatoes, you should whip them with a spoon after mashing. But you don't want to over-mix them otherwise too much starch is released and they go gluey. That's why we don't recommend using a stick blender to mix your potatoes.
There is no need to heat the butter up before adding. The butter is best added cold, as it will melt in. The melted butter distributes fat and milk solids evenly through the potatoes.
A little bit of chopped spring onion (scallions) and chives is a nice addition to mustard mashed potatoes.
Once the potatoes are drained, set them aside to steam dry before mashing. This will stop them being too watery.
Cut all the potatoes to the same size to ensure that they all cook the same.
Add salt and pepper at the end to season, that way you can taste them and add more if you prefer.