You might also know it as pumpkin pie cake or pumpkin crunch cake. It's a dessert, or a crustless pie more than a cake. Imagine a great pumpkin pie filling meets a crumbly topping made with just 2 ingredients.
An electric hand-held mixer is what I always use and it takes about a minute, but you can do it by hand with a large whisk.Make sure it's very well combined and smooth.
You can add the pecans on top of the cake mix before baking the cakeor after about 20 minutes of baking.They will be very dark if you add them from the beginning.