egg white frosting
Sophia Vance
Updated on May 14, 2026
Traditionally made from egg whites and powdered (confectioners’) sugar, it is an easy icing to prepare but should NOT be made with raw egg whites. It is a well-known fact that eggs may contain a bacteria, Salmonella Enteritidis (SE), that can cause foodborne illness.
Is it safe to use egg whites in buttercream?
Yes! Pasteurized egg whites are heat-treated (like milk) so they are safe to eat. They usually come in a box carton in the egg aisle. If you don’t have pasteurized egg whites then you can use my SMBC recipe instead.
Do you have to refrigerate egg white frosting?
As long as your icing has reached a food-safe temperature during cooking, it’s safe to keep your iced cake at room temperature. The high level of sugar in your icing acts as a preservative, just as it does in jams and jellies, and keeps the egg proteins from deteriorating.
How long does egg white frosting last?
While fresh royal icing will always give you the best results, egg white icing can last up to one week if refrigerated and stored properly. Meringue powder based royal icing lasts much longer, up to a month.
Why is it called royal icing?
Royal icing is the classic icing for the Christmas cake – it is ‘royal’ because it was the British Royal Family that used in for their wedding cakes, and naturally if the Royals did it, then we copied it.
Why is my buttercream not fluffy?
Sometimes floppy-looking buttercream has happened simply because your cakes haven’t cooled down enough so that the heat from them rises up and begins to melt your swirls of frosting. Allow your cake or cupcakes to cool fully.
How do I make my buttercream white?
The best way to get a pure white buttercream is to use shortening. It’s what you see in most novelty grocery store cakes. A simple American buttercream made with shortening and powdered sugar. Most bakers though (myself included) prefer to use butter instead of shortening in their buttercreams.
What kind of buttercream do professionals use?
Swiss meringue buttercream is probably the most standard buttercream for pastry professionals. It is incredibly smooth, making it an extremely popular choice for icing cakes. Compared to American buttercream, it has a much stronger butter flavor, but is considerably less sweet.
Is 7 Minute Frosting the same as Swiss meringue?
This frosting is very similar to Swiss meringue, which is also cooked. The big difference is how they are cooked: Swiss meringue is cooked, then beaten off the heat while seven-minute frosting is beaten as it cooks on the heat.
Can boiled icing be stored?
Storing Boiled Frosting
When storing the frosting, be sure to cover it tightly; and then refrigerate. If it is not stored airtight it will begin to set. Once the boiled frosting has been spread on the cake, it can be stored at room temperature, but refrigerating it will help keep the frosting soft and fluffy longer.
Can I leave buttercream frosted cupcakes out overnight?
Cupcakes with buttercream frosting can be left out at room temperature for up to two days. If you are using frosting with dairy or eggs in them, refrigeration is necessary. Frosted cupcakes tend to dry out slower because the frosting acts as a barrier between the top of the cake and the cool air.
Can royal icing be saved?
Royal icing can be stored at room temperature for up to 4 weeks. TIP : I store my royal icing in the fridge in an airtight container with a piece of plastic wrap tightly covering the top, with the lid. I store it in the fridge as it doesn’t separate as much.
Can I Refrigerate meringue frosting?
Yes. Swiss meringue buttercream is great left covered at room temperature for 1-2 days, but after that, refrigerate it for up to 5 days or freeze up to 3 months. If freezing, store in an airtight container, then thaw it at room temperature on the counter.
Should you refrigerate a cake with 7 minute frosting?
How do you store 7 minute frosting? This frosting is safe to store at room temperature for one day. Anytime after that and you should refrigerate it.
What is the difference between glaze icing and royal icing?
Both can be used for decoration purposes, though they behave and look slightly different. One (Glacé Icing) is made with just two ingredients: powdered sugar + water. The other (Royal Icing) also includes egg whites.
What is the difference between royal icing and regular icing?
Royal icing is frosting that’s made from confectioners’ sugar, egg whites, and flavorings, and used in many ways to decorate cookies and cakes. The biggest difference between buttercream frosting and royal icing is texture-buttercream is creamy and soft; royal icing hardens to a candy-like texture.
Why is lemon juice in royal icing?
The lemon juice whitens the royal icing. The royal icing should be light, fluffy, and slightly stiff. You may need to adjust the consistency by adding more egg whites if the icing is too dry or more powdered sugar if it is too wet.