Preheat the oven to 350°F. Grease a 9x13 inch cake pan.
Add the pumpkin puree, evaporated milk, both sugars, eggs, pumpkin pie spice, and salt to the prepared pan and mix well to combine.
15 ounces canned pumpkin puree, 12 ounces evaporated milk, ½ cup (100g) light brown sugar, ½ cup (100g) granulated sugar, 3 eggs*, 2 teaspoons pumpkin pie spice, ¼ teaspoon fine sea salt
Sprinkle the cake mix on top of the wet mixture. Drizzle the melted butter on top and do not mix.
1 box yellow cake mix*, 1 cup (227g) unsalted butter
Bake for 55-60 minutes, or until golden and set in the center with a slight jiggle to it. Allow the cake to cool in the pan for at least 30 minutes before slicing.
Notes
Ensure you are using pure pumpkin puree, NOT canned pumpkin pie filling, which contains added ingredients and sweeteners.
Be sure to use evaporated milk, NOT sweetened condensed milk, as the two are not interchangeable.
To make this cake eggless, use Bob's Red Mill Egg Replacer. Follow the instructions on the package to replace 3 eggs.
For gluten free cake, use a gluten free boxed cake mix.
Store in an airtight container in the refrigerator for up to 4 days, or freeze for up to 3 months.