It tested a cup of black Americano and a cappuccino from five major high street coffee chains: Caffè Nero, Costa, the M&S Café, Pret A Manger and Starbucks.
Which?’s coffee expert said Nero’s Americano was the only coffee where the origin of the bean could be identified. It was also praised for its “smoothness and body”.
The drinks were bought from London coffee shops in June this year. Caffè Nero’s Americano and cappuccino were the most expensive of the high street chains, but scored nine and eight out of 10, respectively.
This compared to Pret A Manger, whose drinks were the least expensive, but which came bottom of the table with scores of three and four out of 10.
The campaign group also highlighted the fact that although Costa’s Americano was 10p cheaper than Nero’s, with a Nero Americano you got two shots of espresso as standard.
A Which? spokesperson said: “Our expert tried a cup of Americano and a cappuccino at five of the major high street chains that sell millions of these coffees to UK consumers. Although this can be down to personal taste or barista skill, he found some big differences and, in particular, praised Caffè Nero’s coffee for its depth of taste.”