I haven't used them as I've always found that their other food colourings aren't very effective and alot is needed to achieve a decent colour which I feel affects the flavour of the icing. I would recommend buying either Squires or Sugarflair paste colours.You can buy these online or from a cake dec shop. They also come with a long use by date usually a good few years.
Looking for food colour to give a bright effect to decorate a child's birthday cake. Are the Dr Oetker gels any good or should i order some food colour paste? I probably won't use them again so didn't want to have to spend alot on them and my local Asda have the Dr Oetker ones.