It's pretty obviously just a birthday cake style frozen dessert: vanilla with colorful sprinkles. It has the dense creaminess of gelato, the indulgent sweetness of cake and icing, and the fun, festive colors you'd associate with any type of celebration.
But here's the best part and the worst part: there are real cake pieces throughout the mix, and the bites that contain some are superb and scrumptious, but they are way too small and far and few between—so most bites, unfortunately, do not contain any luscious birthday cake.
Eating straight from the pint container becomes a mining errand, with each cakeless bite causing more and more frustration and each cakeful one propelling the consumer to dig with renewed fervor in search of that motherlode of legendary cakey goodness.
Alas, there was no giant cache of cake at the bottom of the carton. There were maybe a dozen paltry whispers of baked confection in the entire product. It almost would have been better to include none so we'd have been ignorant of what we were missing.
Our final score would have been at least one and a half stars higher had there been adequate quantities of cake in this product. As is, Sonia will still throw out a generous four out of five. I'll go with three and a half. Trader Joe's Celebration Cake Gelato with Cake Pieces & Rainbow Sprinkles is good, but it needs more mix-ins to be considered great. $3.79 for the pint.
Bottom line: 7.5 out of 10.