Seafoam Frosted banana cake showcases that shiny, fluffy frosting known as —yep, you guessed it—seafoam. Made from brown sugar and egg whites, the icing is, more or less, a meringue that you slather over a cake. Unlike the traditional meringues for pavlovas and pies, this one is boiled instead of baked. Because it generally cooks for seven minutes, seafoam is sometimes referred to as “seven minute frosting.” Frosting or candy? If the name seafoam sounds familiar, but you don’t remember it as an icing, you might be thinking of a candy that bears the same name. A type of divinity candy, it differs from seafoam frosting in that it is boiled until it reaches hard-ball stage on a candy thermometer. Rock hard and riddled with air bubbles, the finished sweet may be coated in chocolate or eaten as is. The origin of the candy’s and icing’s name is unknown. Make your own double boiler To make the seafoam icing, you will need a double boiler. Don’t own this cookware? Don’t worry. You can easily cobble …