The buttercream I am making uses milk pasterized egg whites shortening vanilla and a 1/2 tsp lemon juice  and Confectionary sugar I am making my daughter's wedding cake in Oct and would like to know if this buttercream on cake can sit out for a couple days or needs refrigerated. I did read a forum on here discussing this but did not mention pasterized egg whites

Thank you Jacob

It should be ok for a few days. No cook SMBC is rated non potentially hazardous by our cottage food standards in Texas.....which means it does not require constant  refrigeration to be safe.

MilkNHoney84 I have been wanting to thank you for the past couple days but for some reason both on computer and cell phone would not let me reply so Thank you very much 

You are very welcome. I have problems posting and replying a lot as well.

You are very welcome. I have problems posting and replying a lot as well.