RARE PHOTOS: How to make instant coffee correctly as expert says one mistake makes it bitter | Rare Historical Photos

For many, coffee is a must first thing in the morning, with some early birds reaching for the instant stuff for a quick caffeine fix.

But an espresso guru has explained the secret to making a delicious instant coffee, as one error can make for a bitter cup. Known as "the coffee guy" on social media, the connoisseur demonstrated in a video how to make one "correctly", as many coffee fans are doing it wrong.

In a viral video that's racked up over 12 million views, TikToker @ethanrodecoffee said that missing one crucial step can leave instant coffee tasting burnt and bitter. To make a smooth, flavourful instant coffee, he said the powder must be first mixed with cold water before pouring the boiled kettle.