In the recipe for buttercream icing, it says after all ingredients are mixed together to mix until light and fluffy. Does anyone know the time frame that works for them - 5 min? - 15 min? Is it bad if you mix it too long or not long enough? Thanks for any help!

It depends on how much you are making at one time.

I only mix for a few minutes, longer than that and I get bubbles.

What type of icing are you making? What recipe?

Personally I do crisco/powder sugar buttercream and I only mix on a low speed after I add the powder sugar and for a short amount of time. I know other recipes out there have you mix higher and longer but if I do that I get those icky bubbles in it.

I found (by accident) if you mix (I had a KA) on low for up to 15 minutes you will eleminate the bubbles some seem to get. To me, the longer the better!

Whatever you are using, if you turn your mixer down to very low, and just let it turn around for a few minutes it works a lot of those bubbles out.

I use the Wilton recipe for about three cups.