hello cake experts!

just a little question... if my american buttercream is all butter, icing sugar, milk and flavoring and i use it to dirty ice a cake (vanilla butter cake) then cover with fondant, do i need to refrigerate? current temperature where i am is 28degrees celsius or 82 degrees F.

thank you!!!

I never refrigerate mine.

No there is no need to refrigerate that. Do try to keep it in a cool, dry place - out of sunlight.