Well, after doing some digging I was able to reconnect with the Pastry Chef at High Brewster, a restaurant where I used to work, who made the most delicious cake called Nantucket Oatmeal Spice Cake served with Caramel Sauce. Her name is Ruth Eames and through the miracle of Facebook I was able to contact her and get the recipe which I am including below. Let me just say that you will adore this cake so make it right away. Don't wait! And 'Thank You' again to Ruth for sharing this great recipe.