If your Italian meringue buttercream has turned into a soupy mess because you added the sugar syrup too soon, don't worry; there are steps you can take to fix it. Italian meringue buttercream can be a bit finicky, but with some adjustments, you can save it and bring it back to the right consistency. Here's what you can do:
Chill the mixture: Place the soupy buttercream in the refrigerator for about 15-30 minutes to firm up the butter. This will help solidify the mixture slightly and make it easier to work with.
Re-whip the buttercream: After chilling, take the buttercream out of the refrigerator and use an electric mixer to whip it again. Beat the buttercream on medium to high speed until it starts to come together and thicken.
Add more butter: If the mixture remains too runny after re-whipping, you can try adding more softened butter, a tablespoon at a time. The additional butter should help to stabilize the mixture and achieve the desired consistency.
Fixing curdled buttercream: If the buttercream is curdled after re-whipping, it may indicate that the butter and meringue have not fully emulsified. To fix this, continue beating the mixture until it comes together. If it still doesn't come together, you can try warming the mixture slightly by holding a warm, damp towel around the mixing bowl while whipping. This can help the butter soften and incorporate better.
Chill and re-whip again (if needed): If the buttercream is still not at the right consistency, repeat the process of chilling and re-whipping. It may take a few rounds of chilling and mixing to get it just right.
Flavor adjustments: If you're happy with the consistency but want to enhance the flavor, you can add extracts (e.g., vanilla, almond) or other flavorings to the buttercream while whipping.
Keep in mind that the success of these steps depends on how far the buttercream has progressed in its soupy state. Sometimes, if the buttercream has become too separated, it might be challenging to salvage entirely. However, with patience and experimentation, you should be able to rescue it and turn it into a smooth and creamy Italian meringue buttercream.