Preheat your oven to the temperature specified on the brownie mix box.
In a mixing bowl, prepare the brownie mix according to the package instructions (mixing in water, oil, and eggs).
In another bowl, combine the pumpkin puree, dairy-free creamer or whipping cream, sugar, vanilla extract, pumpkin pie spice, and egg. Mix until smooth and well combined.
Pour the brownie batter into the store-bought chocolate crust, spreading it evenly.
Drop spoonfuls of the pumpkin mixture on top of the brownie batter.
Using a knife or a skewer, gently swirl the pumpkin mixture into the brownie batter to create a marbled effect.
Bake according to the brownie mix instructions, usually about 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Allow the brownies to cool completely in the pan before slicing. Serve and enjoy!
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