how long does swiss meringue buttercream last in the fridge

Swiss meringue buttercream (SMB) is a stable and long-lasting frosting when stored properly. When refrigerated, it can last for several days to a week or more. Here’s a general guideline:

* If stored in an airtight container in the refrigerator at a temperature of 40°F (4°C) or below, Swiss meringue buttercream can last for:
+ 3 to 5 days: Best quality, with optimal flavor and texture.
+ 5 to 7 days: Still good, but may start to lose some of its lightness and flavor.
+ 7 to 10 days: May start to separate or become too firm, but can still be used after re-whipping.

It’s essential to note that the buttercream’s quality and shelf life will depend on factors such as:

* The freshness of the ingredients used.
* The proper storage conditions (airtight container, refrigeration, and temperature control).
* The handling and re-whipping of the buttercream before use.

Before using refrigerated Swiss meringue buttercream, it’s recommended to:

1. Remove it from the refrigerator and let it sit at room temperature for about 30 minutes to allow it to soften.
2. Re-whip the buttercream with a mixer or whisk until it reaches the desired consistency and texture.

If you don’t plan to use the buttercream within a week, consider freezing it. Swiss meringue buttercream can be frozen for up to 3 months. When you’re ready to use it, simply thaw it in the refrigerator or at room temperature, and re-whip it before using.