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How To Make Marmite Roast Potatoes
Marmite roast potatoes – yes, you read that right! A recipe you have to try…

Marmite – You either love it or hate it! But one thing is for sure, these roast potatoes will change a lot of minds. I’m not the biggest fan of marmite, but I can’t say no to one of these.
They are crispy around the edges and soft and fluffy in the middle, it’s quite easy to make and the taste is remarkable. I’m not kidding when I say they are so good.
Think of classic roast potatoes but with a marmite upgrade! It has a slight salty taste and a flavour similar to soy sauce.

Why Try This Recipe
- Super simple cooking process.
- Very minimal prep.
- Great for using up leftover marmite or potatoes.
- Marmite isn’t just for toast! They make great roast potatoes too.
- Full of umami flavour.
Watch How To Make It
Slimming World Marmite Roast Potatoes
Just like my Oxo roast potatoes, these marmite roast potatoes are a popular slimming world recipe. It’s a great way to enjoy a Sunday roast without worrying about calories.
The marmite flavour isn’t overpowering, that’s why it’s a big hit with both marmite lovers and marmite haters.
Recipe Ingredients
Below are the few ingredients needed for this recipe:
- Potatoes: I used maris piper potatoes. I’ve listed the best potatoes for roasting below.
- Marmite: You can use the brand Marmite or non-branded yeast extracts.
- Oil: Use oils suitable for roasting like vegetable oil or sunflower oil. For ‘Slimming World’ friendly marmite potatoes, you can use low calorie oil sprays.
- Salt: For extra flavour, I like to add salt to the water when parboiling the potatoes. However, this is optional.

What Are The Best Potatoes For Roasting
Potatoes like king edwards, maris pipers and russet potatoes are great for roasting. These potatoes are quite floury, when roasted they have a fluffy interior with crispy edges; this texture is perfect for roast potatoes.
How To Make Marmite Roast Potatoes
Below is a step-by-step guide on how to make marmite roast potatoes. Full recipe instructions are on the recipe card.
Step One:

Preheat your oven to 200°C (gas mark 6, 180°Fan) and peel and chop the potatoes into quarters.
Bring a pot of water to the boil and add salt. Add the potatoes to the pot and parboil for 10 minutes.
If you’re potatoes are medium to small in size, cut the potatoes into halves instead of quarters. For really small potatoes, parboil for only 5 minutes.
Step Two:

Whilst the potatoes are boiling, add oil and a tablespoon of marmite into your roasting tray and place in the oven.
Step Three:

Drain the water from the pot. Place the lid on the pot and shake the potatoes. This will rough up the edges and create really crispy potatoes.
Step Four:

Carefully take the roasting tray out of the oven and mix the marmite and oil together. Pour the potatoes into the tray and mix it into the marmite and oil mixture.
Step Five: