re: Red, black and white demask 40th cake

Hi… regarding your air bubble problem…
I experienced this on quite a few occasions, when I worked as an employee of one particular business.
On those occasions, it was almost always with the white choc, raspberry mudcakes.
Their method was to stir frozen raspberries through a white mud cake mix.
Due to the time constraints, lack of staff and other factors, some preparation on cakes was started 1-3 days before pick-up.
In my opinion the berries were deteriating, and the built up of gas, was creating the problem (as it wasn’t occuring in other flavours).
I have also seen posts on facebook pages where this has occurred, when cakes were kept refridgerated… later covered, and bubles occurred later on. Again… if you think about it, things expand as they warm up. Including the air within your cake, from the aeration we put there, to make them light and fluffy.
Not sure if any of these situations apply to your cake. Hope this helps. Julez XXX