Yield 6-8 glasses
If using a stand mixer, grab a paddle. First mix egg whites and icing sugar on medium speed for 5 mins.
Then add butter and vanilla and mix for another 5 mins till right consistency or fluffy.
Buttercream can be stored at room temperature up to 2-3 days.
Recipe by SweetenTheWorld at https://sweetentheworld.com/buttercream-succulents-cake-tutorial-with-video/