Hey y'all! Ready to indulge in a treat that combines the creamy sweetness of white chocolate with the deep, rich flavor of fudge? These White Chocolate Brownies with Fudge Swirl are outrageously gooey, perfectly chewy, and guaranteed to wow at any potluck, celebration, or cozy night in. The decadent fudge swirl not only looks gorgeous but adds an extra layer of chocolatey goodness that makes each bite unforgettable. Let's get cooking!
Why You'll Love This White Chocolate Brownies with Fudge Swirl Recipe
- Ultra-fudgy texture with a beautiful, marbled swirl for visual appeal.
- Simple pantry ingredients—no fancy tools or techniques required.
- Perfect for birthdays, holidays, or just because you’re craving something sweet.
- White chocolate adds a creamy, vanilla undertone that perfectly balances the fudge.
- Easy to customize with your favorite mix-ins or toppings.
Ingredients for White Chocolate Brownies with Fudge Swirl
- 1 cup (170g) high-quality white chocolate, chopped
- ½ cup (113g) unsalted butter
- ¾ cup (150g) granulated sugar
- 2 large eggs, room temperature
- 1 teaspoon pure vanilla extract
- 1 cup (125g) all-purpose flour
- ½ teaspoon salt
- For the Fudge Swirl:
- ⅓ cup (60g) semisweet chocolate chips
- 2 tablespoon (30g) unsalted butter
- 2 tablespoon (15g) unsweetened cocoa powder
- 2 tablespoon (30g) powdered sugar
- 1 tablespoon milk
How to Make White Chocolate Brownies with Fudge Swirl
Step 1: Prep and Preheat
Preheat your oven to 350°F (175°C). Line an 8x8-inch (20x20cm) square baking pan with parchment paper, letting a bit hang over the sides for easy lifting. Lightly grease with butter or nonstick spray.
Step 2: Melt White Chocolate and Butter
In a microwave-safe bowl, combine the white chocolate and ½ cup butter. Microwave in 20-second bursts, stirring each time, until melted and smooth. Allow to cool slightly.
Step 3: Whisk Wet Ingredients
In a large mixing bowl, whisk together the sugar, eggs, and vanilla extract until pale and slightly thickened, about 1 minute.
Step 4: Combine Wet and Dry Ingredients
Slowly pour the melted white chocolate mixture into the eggs, whisking constantly to prevent scrambling. Sift in the flour and salt, gently folding until just incorporated. Don’t overmix!
Step 5: Make the Fudge Swirl
In a small microwave-safe bowl, combine semisweet chocolate chips and 2 tablespoon butter. Microwave in 20-second intervals until melted and smooth. Stir in cocoa powder, powdered sugar, and milk until glossy and pourable.

Step 6: Assemble and Swirl
Pour the white chocolate brownie batter into your prepared pan and smooth the top. Dollop spoonfuls of the fudge mixture over the top, then use a knife or skewer to gently swirl it into dramatic patterns. Don’t overdo it – a few swirls is perfect!
Step 7: Bake and Cool
Bake on the center rack for 28–32 minutes or until the edges are set and a toothpick inserted in the center comes out with a few moist crumbs. Cool completely in the pan before slicing for the cleanest, fudgiest bars.
Notes for the Best White Chocolate Brownies with Fudge Swirl
- For maximum gooeyness, slightly underbake your brownies and let them finish setting as they cool.
- Use a good quality white chocolate—real cocoa butter makes a huge flavor difference (learn how to choose white chocolate).
- Swirl gently for the prettiest marbled effect. Too much swirling blends the fudge into the batter!
Variations: Fun Twists for White Chocolate Brownies with Fudge Swirl
- Nutty Crunch: Add ½ cup chopped pecans or macadamia nuts to the batter.
- Berry Burst: Swirl in tablespoons of raspberry or strawberry jam alongside the fudge swirl.
- Salted Caramel: Drizzle caramel sauce over the top before baking and finish with a sprinkle of flaky sea salt.
Required Equipment for White Chocolate Brownies with Fudge Swirl
- 8x8-inch (20x20cm) baking pan
- Parchment paper
- Mixing bowls (large and small)
- Microwave or stovetop double boiler
- Whisk and spatula
- Knife or skewer for swirling
Storage Instructions for White Chocolate Brownies with Fudge Swirl
Once cooled, store brownies in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate for up to 1 week, or freeze (well-wrapped) for up to 2 months. Thaw at room temperature before serving for best texture.
Serving Recommendations & Pairings
- Cut into generous squares and serve slightly warm with a scoop of vanilla ice cream.
- Pair with a fresh cup of coffee, hot chocolate, or chai latte for a cozy treat.
- Dust with powdered sugar or drizzle with extra melted chocolate for added flair.
Pro Tips for the Best White Chocolate Brownies with Fudge Swirl
- Let brownies cool completely before slicing to ensure distinct layers and gooey centers.
- For ultra-shiny tops, vigorously whisk the eggs and sugar until pale before adding the chocolate mixture (why this works).
- Use a plastic knife or a hot, wet knife for the cleanest cuts and minimal crumbs.
FAQ: White Chocolate Brownies with Fudge Swirl
- Can I use white chocolate chips instead of bars?
- Yes, but for best results, use high-quality white chocolate chips with real cocoa butter for maximum creaminess.
(Learn more) - How do I know when the brownies are done?
- The edges will look set and a toothpick in the center should come out with a few moist crumbs—don’t overbake for fudgy texture!
- Can I double the recipe?
- Absolutely! Just bake in a 9x13-inch pan and increase the bake time to 35–38 minutes, checking for doneness as above.
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Yield: 16 brownies
Ingredients
- 1 cup white chocolate chips
- ½ cup unsalted butter, melted
- ¾ cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- ¼ teaspoon salt
- ⅓ cup semi-sweet chocolate chips (for fudge swirl)
- 2 tablespoons heavy cream
Instructions
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1Preheat the oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper and lightly grease.
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2In a microwave-safe bowl, melt the white chocolate chips and butter together in 30-second intervals, stirring until smooth. Let cool slightly.
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3Whisk in the sugar, eggs, and vanilla extract until well combined. Stir in the flour and salt until just incorporated.
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4Pour the batter into the prepared pan and spread evenly.
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5In a small bowl, melt the semi-sweet chocolate chips with heavy cream until smooth. Drop spoonfuls of the fudge mixture over the brownie batter and use a knife to swirl gently.
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6Bake for 28-32 minutes, or until the edges are set and a toothpick inserted in the center comes out with a few moist crumbs. Cool completely before slicing and serving.
Approximate Information for One Serving
Nutrition Disclaimers
Number of total servings shown is approximate. Actual number of servings will depend on your preferred portion sizes.
Nutritional values shown are general guidelines and reflect information for 1 serving using the ingredients listed, not including any optional ingredients. Actual macros may vary slightly depending on specific brands and types of ingredients used.
To determine the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe (not including the weight of the container the food is in) by the desired number of servings. Result will be the weight of one serving.
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