PME Red Concentrated Natural Food Colouring 25g 1 "Will NOT make a successful Red Velvet CaKe!" Mrs Wesson 22 August 2018 Even though there were negative reviews I decided to go for this red colourant having read the first review above being successful for a Red Velvet Cake. My recipe advised using 1 teaspoon of Concentrated Red Food Colouring. However even after using a third of the bottle it had still not turned it the correct red for this type of cake. Afraid that if you want to make a successful and professional looking Red Velvet cake there have no choice but to spend at least double the amount plus double the postage on another site I found. So sorry I settled for a cheaper option. A note from the team Thank you for placing your review. I'm sorry that you'd been disappointed with the results. I'm glad our customer services colleagues have been able to put things right for you.