The most delicious meringue cookies are made with just four ingredients – egg whites, sugar, cream of tartar, and vanilla extract. Vanilla will make your meringues less white, but it will not ruin the taste. Other flavorings such as lemon juice and white vinegar can also be substituted. Before you start baking, follow the instructions carefully, and take note of any baking tips.
You’ll also need a cream of tartar to help stabilize the egg whites and help them achieve stiff peaks. Vanilla will add flavor, and salt will balance the sweetness.