I normally only use 2lbs of PS instead of 2.5. I made 3 batches the first two batches that I used 2.5 are gritty and the 3rd batch that I only used 2lbs isn't. Can anyone suggest how I can fix the 2 batches by adding extra water, shortening, etc?
TIA

You could add a 1/4 of the other ingredients you usually use back to that batch and it should work out right if my math is correct... but it's 2am here and I've been baking, decorating, and have been at a softball game so don't hold me to that math LOL

Did you ever find a solution to your problem? I've just had the same thing occur - gritty BC icing. I've been decorating cakes for 5 years and have never had this happen. All new/fresh ingredients, just can't figure out why my icing is gritty!!!

Can anyone offer suggestions? Thanks!

Well after reading several posts on here I suspect it is the PS I used. I bought two new bags, and tried two batches of BC icing (one with each bag) and BOTH came out gritty. This is the Sam's Club PS that I've been using for years. I've found it to be better than Domino's, but I guess I had to get my hands on a bad batch eventually. Oh well, good thing this cake is for my son's birthday - I'm not making a third batch, and it still tastes good, so we'll just have to stick with it!