Celebrate summer with this sweet and tangy Cherry Limeade Cake, inspired by the iconic fizzy beverage from Sonic Drive-In. I recommend using bottled key lime juice in this recipe because it shortcuts to work of squeezing lots of tiny limes. This recipe also calls for 'cherry juice'. By this I mean the juice from the jar of maraschino cherries. The soaking syrup in this recipe can be variable but I recommend using all of the syrup on the cakes for a wet crumb. Use less if you must, but the hallmark of this soft drink cake is its wet texture. The picture shows the texture when using the entire amount of syrup.