The Mirror put popular supermarket butter brands to the test to see which tastes best – with one £2.15 Lurpak dupe tasting ‘just like the real thing’ while another scored a miserable 0/5The Mirror put popular supermarket butter brands to the test to see which tastes best – with one £2.15 Lurpak dupe tasting ‘just like the real thing’ while another scored a miserable 0/5