This thread sent me searching for my old copy of The Commissary carrot cake recipe, which I obtained while living in Philadelphia in the late 1970s. I compared the two recipes, which were very close, and noted only a few discrepancies, primarily in the pecan cream filling. My recipe calls for 2 C sugar, 6 T flour, 1 t salt, 2 C heavy cream, 1/2 lb. unsalted butter, I 1/2 C pecans and 1 T vanilla. The preparation instructions are otherwise the same. For the cake, my recipe calls for 2 C less 2 T flour and confirms the notation at the bottom of the linked page that the amount of baking soda is 1 t. For what it's worth, I always felt that my recipe's pecan cream filling was sweeter than the restaurant's version, so the published recipe may in fact be better as well as more authentic. I'm posting what I have for those who may prefer a sweeter filling. In any event, I have never had a better carrot cake than The Commissary's and it was a sad day for Philadelphia when that restaurant closed (although I was long gone from the city by that time).