Rainbow Cookie Cake

Does Costco have this rainbow cookie bar cake nationwide or is this just an NYC/East Coast thing?

First time trying rainbow cookies in cake form

I'm never quite sure what things are local to our area for the holidays. Today at Costco they were sampling this rainbow cookie bar cake, which is pretty much the classic rainbow cookie in a larger cake form. Layers of sponge cake with raspberry and almond paste filling, in the usual rainbow colors, and topped with chocolate ganache. It was rich and creamy, but also light at the same time because of the airy sponge cake. The soft chocolate icing was an interesting contrast to the usual firm chocolate layer in the cookie. In my opinion as a rainbow cookie lover, both work well.

Rainbow cookies from last year's Christmas dessert, in case you're unfamiliar with their greatness

Rainbow cookies are everywhere around here, especially at the holidays. The ones from the local Italian bakeries are still better, but the Costco ones are pretty good. I know this is an Italian-American creation, so I'm not sure how much the rest of the country gets to experience this delicious treat. If anyone is having a big party for Christmas, this cake (or the cookies) should really be a contender for the dessert table.