You've been cooking roast potatoes wrong – two ingredients get them extra crispy

You can't have a proper Sunday lunch without super crispy roast potatoes – so follow this cook's top pieces of advice to get them perfectly crunchy every single time

Upgrade your Sunday roast with these three simple tips (Stock photo)

You can't beat a deliciously golden roast potato.

They provide a lovely bit of texture to your roast dinner and help to mop up any gravy. The only problem is, they can be pretty difficult to cook.

Failing to brown your tatties in the pan can leave them looking rather anaemic. But cutting them too small and browning them for a long time in the oven dries them out.

Thankfully though, foodies have come forward to share their words of wisdom. And one of these people is Marzia, who is known as Little Spice Jar online.

The food creator revealed three simple steps to up your roastie game. You only need two additional ingredients – and it's likely you'll never look back again.

Marzia said: "The first tip is to use the right potato. You want something starchy like a Russet potato, which makes them extra crispy in the oven.

"The second thing you want to do is boil your potatoes in alkaline water and we do this by simply adding baking soda to the water while the potatoes are boiling – this breaks down the surface of the potatoes and gives them more nooks and crannies that brown up in the oven."

As well as adding baking soda to improve texture, Marzia recommends picking up some ghee or duck fat. These products have a 'higher smoking point', allowing them to "cook for a longer period of time at a higher temperature without burning."

For a final flourish, you can brush some garlic butter over the potatoes. This is an optional step, but can really add a lovely punch of flavour.

Viewers were very impressed with Marzia's tips – and took to the comments section to say so. One wrote: "I'm a chef and I can tell you this tutorial is perfect. Everything you've done 100 per cent [right]."

And another agreed, commenting: "I'm going to cry because it looks so good."