When pouring the butter over (or placing pads of butter on top), make sure you get full coverage.
The pumpkin dump cake recipe
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The melted butter.
Tamp down the cake mix, if you want. Strive for even coverage.
Pour on the cake mix.
The yellow cake mix.
Pour the pumpkin puree mixture into a greased 9×13 pan.
Beat the eggs, evaporated milk into the puree.