One of Britain's best loved chocolate bars, Mars' silky smooth Galaxy Ripple is celebrating its 50th birthday this year.

So we got a sneaky peek inside the factory where the famous chocolate is made...

When it first launched back in 1969, Mars Ripple bars originally featured a blue wrapper. Some loyal fans may even remember, with the chocolate bar only changing to its current brown wrapper in 1988.

The inside of every Galaxy Ripple is unique, thanks to the nature of how the ripple folds, meaning no two bars are exactly the same.

But to ensure the bars are always up to the highest standards, Mars factory puts its offerings through over 1000 hours of taste testing per year, at their headquarters in Slough.

Galaxy Ripples used to look like this

How are Mars Ripple chocolate bars made?

To make the iconic treat, first, cocoa, milk and sugar are mixed together to make chocolate, before being tempered to ensure it has a nice gloss and snap.

The chocolate is then cooled, swirled and cut to form the beautiful Ripple we know and love today.

Finally, the bar is then passed through a curtain of chocolate to coat it all over with its silky smooth outer layer.

They're a British favourite

Ryan Braddon, Operations Manager, Mars Wrigley UK said: “We are proud of our strong heritage of manufacturing in Britain, bringing our quality products to millions of consumers who love our brands. We’re thrilled to be celebrating 50 years of RIPPLE this year – what a milestone and a great excuse to take a moment to celebrate with a bar!”