How do I get rid of the air bubbles in my buttercream??? I'm using a kitchen aid mixer, real butter... and it doesn't seem to matter if I mix longer or shorter. I still get these bubbles that look like they're "dragged" out when I frost the cake. Any suggestions??!!!

Fill it allll the way up and mix on lowest speed for a long time with the PADDLE.

I agree! it must be stuffed! here is a video that shows how:

Very helpful!!! Thank you. I'm definitely NOT mixing it long enough. Here's hoping I can get the next batch looking better.