Ingredients
Brownie Filling
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1 cup unsalted butter, melted
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1 ½ cups granulated sugar
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¾ cup light brown sugar, packed
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4 large eggs, room temperature
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1 tablespoon vanilla extract
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¾ cup unsweetened cocoa powder
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1 cup all-purpose flour
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½ teaspoon salt
Pie Base
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1 unbaked 9-inch pie crust (store-bought or homemade)
Optional Add-Ins
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1 cup chocolate chips or chunks
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½ cup chopped walnuts or pecans
Instructions
Preheat oven to 350°F (175°C). Place the unbaked pie crust into a 9-inch pie dish and crimp the edges. Set aside.
In a large mixing bowl, whisk together melted butter, granulated sugar, and brown sugar until smooth and glossy. Add eggs one at a time, whisking well after each addition. Stir in vanilla extract.
Sift in cocoa powder, flour, and salt. Fold gently until just combined. Do not overmix—this keeps the brownie filling gooey and tender.
Fold in chocolate chips or nuts if using. Pour the brownie batter evenly into the prepared pie crust and smooth the top.
Bake for 40–45 minutes, until the edges are set and the center is slightly jiggly. A toothpick inserted near the center should come out with moist crumbs. Cool for at least 30 minutes before slicing.
Notes
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Do not overbake—gooey texture depends on slightly underbaking.
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Use room-temperature eggs for a smooth batter.
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Let the pie cool slightly so it sets but remains fudgy.
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Cover edges with foil if crust browns too quickly.