Help!buttercream keeps curdling!!

[notsurewot2do]

Have tried on different occasions to make buttercream icing with my dd but it keeps on curdling!What are we doing wrong?Originally used 'Pure' sunflower spread as my youngest dd has a dairy allergy and then tried a different 'veg spread' and still the same problem!Please help!

I was going to say are you using real butter. Mine has always curdled if I use anything else, so I am no use!

What recipe do you use? All you need is one part "butter" to two parts icing sugar.

use a lot less butter - mixture should be really really dry, not binding at all. Then add a splash of boiling water to bring it all together.

I've done many many experiments with dairy-free buttercream (I make cakes!). This sounds a bit yuk, but it really works and tastes fine. I use Vitalite (the others don't seem as good), with a little bit of Trex - I know but trust me . Twice as much icing sugar as fats, ie 85g vitalite/15g trex/200g icing sugar, tiny amount of boiling water if you need it, but you usually don't for dairy-free. Use an electric whisk, forget trying to do it by hand, it just won't come together. Use half and half trex/vitalite in your cake too, because dairy free can be a bit dry/crumbly

I use 115g of pure sunflower, 225g icing sugar, 1 teaspoon of vanilla essence and a couple of tablespoons of oatly milk. I normally add cocoa powder to taste for chocolate buttercream (DD loves it).

I shove it all into the magimix and voila.

Thankyou for all your suggestions...will try out during the week and let you know!!