Meringue powder safe for Breville Barista Express (BES870XL)?

[Keromyru]

I adore the flavour and texture of cold or warm frothed milk with essentially just meringue powder. I found that this can be purchased and pretty much tastes almost identical to Starbuck's cloud powder. I was using a Starbucks frother but it eventually just broke down and I ran out of cloud powder (it was out of season and it was going to be thrown out so I took it home instead :x ).

I have a Breville Barista express and I while at Starbucks the machines could handle having meringue powder being frothed I am curious if anyone has attempted something like with this machine?

I might attempt with a small amount just to try; though cleaning might be complicated!