Hi Celena! I don’t freeze or refrigerate between layers in this tutorial. I didn’t have any problem with the colors blending together and I think its because I start with a frosted cake that has been refrigerated, so when I spread each color on it’s going on top of a cooled cake and has a chance to set up faster. If you’re concerned about the colors blending though, you could certainly try freezing or refrigerating between layers.

Hi Carole! It sounds like there are air bubbles in your buttercream finish. The way to fix that is pop the cake in the refrigerator for about 30 minutes to let it firm up and then do another thin layer of buttercream over the top of that to fill in all the air bubble holes and smoothe it all out. You can also use this guide I wrote on how to create a smooth buttercream cake: https://sugarandsparrow.com/smooth-buttercream-cake-tutorial/