1. Prep the Oven and Pan:
Preheat your oven to 325°F (163°C). Generously grease a 9×13-inch baking dish with butter or non-stick cooking spray.
2. Create the Buttery Crust:
In a medium bowl, combine the yellow cake mix, 1 egg, and the softened butter. Use a mixer on medium speed until a thick, soft dough forms. Transfer the dough to the prepared baking dish and press it into a smooth, even layer using your fingers or the back of a spoon.
3. Whip Up the Gooey Filling:
In a large bowl, beat the softened cream cheese until it’s completely smooth and lump-free. Add the 2 eggs and vanilla extract, mixing until just combined. Gradually add the powdered sugar (minus the reserved ¼ cup) in batches, mixing on low speed at first to avoid a sugar cloud, then increasing to medium until the filling is silky and smooth.
4. Assemble the Bars:
Pour the creamy filling over the crust. Use a spatula to spread it evenly to the edges, creating a smooth, glossy top.
5. Bake to Perfection:
Bake for 40-50 minutes. The bars are done when the edges are lightly golden and puffed, but the center still jiggles slightly when you gently shake the pan. This is crucial for the signature gooey texture! Avoid overbaking.
6. Cool Completely:
Place the pan on a wire rack and allow the bars to cool completely to room temperature. The center will sink and set as it cools. For cleaner slices, you can then refrigerate them for an hour or two.
7. Garnish and Serve:
Once completely cool, use a sifter or fine-mesh strainer to dust the reserved powdered sugar over the top. Cut into 24 squares and enjoy!
Chef’s Tips & Flavor Twists
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The Gooey Guard: Do not overbake! That slightly wobbly center is what gives you the perfect, creamy texture once cooled.
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Citrus Zest: Add 1 teaspoon of lemon or orange zest to the filling for a bright, refreshing note.
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Festive Swirl: Before baking, dollop ¼ cup of raspberry or strawberry jam over the filling and use a knife to swirl it gently for a marbled effect.
Serving Suggestions
These bars are a dream on their own, but you can elevate them for any occasion:
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À la Mode: Serve a warm square with a scoop of vanilla ice cream.
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Berry Bliss: Top with fresh raspberries or strawberries and a dollop of whipped cream.
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Drizzle Delight: Finish with a zigzag of caramel or chocolate sauce.
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The Perfect Gift: Package individual squares in cellophane bags for a delightful homemade treat.
Perfect for potlucks, bake sales, holiday platters, or whenever a sweet, decadent craving strikes
