Give your cakes and pies a light and fluffy look by topping them with billowy white meringue. Making this yummy frosting takes patience, but the result is deliciously worth it. Follow this step-by-step guide to make Fluffy Vanilla Bean Meringue Frosting and Swiss Meringue. And as crazy at it seems, the weather can affect the outcome of the meringue. If it's humid or rainy outside, postpone making it to ensure the topping is as light and airy as possible.