Preheat oven to 350 degrees and grease a 13x9 baking dish.
In a bowl, mix white cake mix, vegetable oil, water, and eggs together.
Once combined, add in pumpkin puree, brown sugar, pumpkin pie spice, cinnamon, allspice and vanilla extract. Mix until combined.
Pour the batter into the prepared baking dish, spreading in an even layer.
Bake for 25-28 minutes, or until a cake tester comes out clean.
Allow to cool for 10 minutes.
Using the back of a wooden spoon, poke holes into your cake, only poking about half way down.
Reserve 2 Tbsp of Eagle Brand® Sweetened Condensed Milk (you will use this in the pumpkin cream filling).
Pour the remaining Eagle Brand® Sweetened Condensed Milk all over the holes of the cake. Set the cake aside.