I was trying to make a big batch of BC but I must have use to much of something!!!!!!

my buttercream is very runny, and I have already put enuff sugar, is there anyway to fix it or trash it!?

thx

I would say put more sugar and see if it tastes ok.

Add more powdered sugar and stick it in the fridge for a while.

Well, it would help to know what recipe you were trying to make. And how much of each ingredient you actually did use - and then, how much you added to correct the problem.

Usually adding more powdered sugar helps.....

Sorry I couldn't be more helpful.

thanks, I will try that, but it's like syrup, so I may have to start over!

I do have a test cake from extra batter, also all the cakes are going under fondant, so I am icing the test cake and will let it sit till later to see if it dripped down the sides

If you add very much powdered sugar, you would need to add more shortening also or it will get too heavy. If you have a lot made you might try dividing it in half and working with only half of it. I would measure out how much powdered sugar I add and add the same ratio of shortening. You would almost be starting over, you just wouldn't add any liquid.

I just added more sugar and it is sooooo sweet! I may just put a very light coat since MM fondant will cover it and vanilla mousse is going in the layers!

How does that sound?

You mentioned you are going to use vanilla mousse. That means, you really won't use the buttercream that much. You're just going to use it as a dam and I would suggest you just use a light crumbcoat under the fondant (that's what I do). I don't think people would taste the super sweetness of buttercream in that case.