can you keep swiss meringue in the fridge?
How to Make Perfect Swiss Meringue Buttercream 1 You can keep the Swiss meringue butter cream in the fridge in a sealed container for up to one week. 2  When you need to use the icing, take it out of the fridge, let it come back to room temperature and beat the icing until it is smooth. If you do have to store it in the fridge or freezer, let it come back to room temperature and then bet it back to the right texture. 2  Use your beaters and mixer on lower speeds because whipping it faster can create curdled looking butter cream. 3  Make sure your utensils and bowl are completely fat free and slightly cool.