I came up with this cake for my Dad's birthday. I love Furr's Millionaire Pie and wondered if it could be converted to a type of cake. This is my adaption of Furr's Millionaire Pie in a cake, and it's been a hit with family and friends! I started off with a Rainy Day Yellow cake (Recipe # 108059), but used one whole cup of butter (which is reflected in this recipe as well as adaptations to the directions). For the filling, I used Furr's original recipe, then added the pecans (doubled the pecans) and pineapple from the recipe's whipped topping into the filling. Then for the topping, I just left it as a whipped topping. I didn't want the topping to have too much texture or look too funky, which is why I chose to include the pineapple and pecans into the filling instead. This cake is very dense and very sweet. It's a little bit of a mix between Furr's Millionaire Pie and pineapple upside down cake. I may actually add more pineapple the next time I make it. I hope that you enjoy it!!