What flavoring ingredient is commonly used in Italian meringue?

In Italian meringue, vanilla is a commonly used flavoring ingredient. This is primarily due to its ability to enhance the overall taste without overpowering the delicate sweetness of the meringue itself. The process of making Italian meringue involves whipping egg whites until soft peaks form and then gradually adding a hot sugar syrup. Vanilla extract is often incorporated during or after this process to infuse the meringue with its aromatic and sweet flavor.

Using vanilla adds a warm, rich undertone that complements a variety of desserts, making it a versatile choice in pastry applications. It pairs beautifully with many other ingredients and is often the go-to flavor for creams, frostings, and fillings that utilize meringue.