Guava cake is as much about the color as the flavor — a sheet cake baked with guava juice and gelatin, then soaked with even more guava syrup so every bite is moist and vividly pink. It's a birthday-party and potluck standard that nobody in Hawai'i needs explained.
The bright color comes from guava-flavored gelatin powder (or a splash of food coloring if you're using pure guava juice), and the cream cheese frosting keeps the sweetness in check.
