Hazelnut and Brown Butter Cake

When I was at L’Impero, we had these amazing pastry chefs, Heather and Jerry, who had this hazelnut cake on the menu. They would make it in sheets, trim the corners to create perfectly shaped portions for guests, and then leave piles of the unsellable edges on the shelf in their station for the rest of the staff to snack on. Eventually I had to beg them to take it off the menu because I just couldn’t resist it, it was that ridiculously good. Once in a blue moon I’ll still make this ... when