These bar cookies are a Southern take on buttermilk pies. I have never had a buttermilk pie so this was a new dessert for me and my family. The crust is baked first with flour, sugar, cornmeal, cornstarch, salt and butter. The topping as Dorie calls it is custard-like and made with buttermilk, eggs, sugar, vanilla, cornstarch, butter and blueberries.
I served this at room temperature the first time. The reviews were mixed. My husband liked it but thought it needed more blueberries. I did add the recipe amount of one cup but I also thought it could have used more. We both liked the crunch of the crust with the addition of cornmeal. I did not love the egg/custard taste of this dessert but I think it is just a personal preference. Leftovers were served cold which I liked better. My husband said I could make this again.