You will love the fresh taste of this Key Lime Cake! Key Limes or regular limes will work. It is tender with a tangy fresh flavor we love!
In a large bowl, beat together the butter and cream cheese with an electric mixer. Add lime juice and lime zest. With the mixer on low speed, add the powdered sugar a cup at a time until smooth and creamy.
Spread on cooled cake and garnish with additional lime zest.