Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish.
In a large bowl, combine the mashed sweet potatoes, crushed pineapple (with juice), sugar, and cinnamon. Mix everything together until well combined.
2 Cans Sweet Potatoes, 1/2 Can Crushed Pineapple,, 1 Tablespoon Granulated Sugar, 1 teaspoon Ground Cinnamon
Pour the sweet potato mixture into the greased baking dish, next sprinkle a small amount of crushed pecans and spread it out evenly.
1 Cup Pecans
Sprinkle the dry cake mix evenly over the sweet potato mixture.
1 Box Yellow Cake Mix
Top the cake mix with the remaining chopped pecans.
1 Cup Pecans
Add the sliced butter pieces over the top of the nuts and cake mix, making sure to cover as much of the dry mix as possible.
1 cup Butter
Bake in the preheated oven for about 50-60 minutes. At around 40 minutes, open the oven and lightly pour the pumpkin puree juice over any unbaked cake spots. Place back in the oven for the remaining time or until the top is golden brown and the cake is set.
1 Tablespoon Sweet Potato Juice from the can
Once done, remove it from the oven and let it cool. Serve with vanilla ice cream and caramel.
1 Tablespoon Caramel