Fudgy Brownie Cake (Double the Chocolate!)

ByElle Rivers

Rich brownie meets tender cake in this chocolatey dessert with layers of fudgy texture. A secret ingredient creates incredible moistness while keeping things simple—ready in 45 minutes.

Why This Recipe Works

  • Perfect for crowds or celebrations
  • No fancy equipment required
  • Stays moist for days
  • Easier than layering regular cake
Fudgy Brownie Cake
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Fudgy Brownie Cake

Course: DessertDifficulty: Easy
Servings

12

slices
Prep Time

15

minutes
Cook Time

30

minutes
Total Time

45

minutes

Ingredients

  • For the Brownie Cake:

  • 1 cup unsalted butter, melted

  • 2 cups granulated sugar

  • 4 large eggs, room temperature

  • 2 teaspoons vanilla extract

  • 3/4 cup unsweetened cocoa powder

  • 1 cup all-purpose flour

  • 1/2 teaspoon salt

  • 1/2 teaspoon baking powder

  • 1 cup semi-sweet chocolate chips

  • For the Chocolate Frosting:

  • 1/2 cup unsalted butter, softened

  • 3 cups powdered sugar

  • 1/2 cup unsweetened cocoa powder

  • 1/4 cup heavy cream

  • 1 teaspoon vanilla extract

  • Pinch of salt

Directions

  • Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking pan, then line with parchment paper for easy removal.
  • Whisk melted butter and sugar in a large bowl until well combined. Add eggs one at a time, whisking after each addition, then stir in vanilla extract.
  • Sift cocoa powder, flour, salt, and baking powder directly into the wet ingredients. Fold gently with a spatula until just combined—batter should look thick and glossy.
    💡 Tip: Don’t overmix or your cake will lose its fudgy texture and become dry.
  • Fold in chocolate chips, reserving a handful for topping if desired. Pour batter into prepared pan and spread evenly to edges.
  • Bake for 28-32 minutes until a toothpick inserted in the center comes out with a few moist crumbs. The top should look set but still slightly soft in the middle.
    💡 Tip: Underbaking by 2 minutes creates the fudgiest texture—the cake continues cooking as it cools.
  • Let cake cool completely in the pan on a wire rack, about 1 hour. The center will sink slightly as it cools, which is normal for this fudgy style.
  • Make the frosting by beating softened butter until creamy. Add powdered sugar and cocoa powder gradually, alternating with heavy cream, until smooth and spreadable.
  • Spread frosting over cooled cake in swirls or smooth it for a clean finish. Sprinkle with reserved chocolate chips or chocolate shavings if desired.
  • Slice into 12 pieces and serve. For cleanest cuts, wipe your knife between slices.

🎯 Pro Tips & Substitutions

Yes, this brownie cake actually tastes better the next day as flavors develop. Bake and cool completely, then wrap tightly in plastic wrap without frosting. Store at room temperature for up to 2 days or refrigerate for up to 5 days. Frost just before serving for best appearance. You can also freeze the unfrosted cake for up to 3 months—thaw overnight in the fridge before frosting.

Dutch-process cocoa gives the deepest, darkest chocolate flavor and creates that signature brownie color. Hershey’s Special Dark or Ghirardelli are excellent choices. Regular unsweetened cocoa powder works too but produces a lighter color and slightly more acidic taste. Avoid hot cocoa mix as it contains sugar and won’t work in this recipe.

Overbaking is the main culprit for dry brownie cake. Check at 28 minutes—the toothpick should have moist crumbs, not come out clean. Another cause is measuring flour incorrectly. Spoon flour into your measuring cup and level off instead of scooping directly from the bag, which packs in too much. Make sure your eggs are room temperature so they incorporate smoothly without extra mixing.

You can use a 9-inch square pan for a thicker, taller cake—increase baking time to 35-40 minutes. For an 8×8-inch pan, use half the recipe or expect a very tall cake that needs 40-45 minutes. Two 8-inch round pans work great for a layer cake—bake for 25-28 minutes per layer. Check doneness with the toothpick test regardless of pan size.

Store frosted brownie cake covered at room temperature for up to 3 days or refrigerated for up to 5 days. The fudgy texture actually improves with time. If refrigerated, let slices sit at room temperature for 15 minutes before serving for best flavor and texture. For longer storage, wrap individual slices in plastic wrap and freeze for up to 3 months. Thaw in the fridge overnight.

❓ Frequently Asked Questions

Yes, substitute the all-purpose flour with a 1:1 gluten-free baking flour blend that contains xanthan gum. Bob’s Red Mill or King Arthur Measure for Measure work perfectly. The texture will be slightly denser but still deliciously fudgy. Avoid almond flour alone as it won’t provide enough structure.

No, chocolate chips are optional but add extra pockets of melted chocolate throughout. You can skip them for a smoother texture, use chopped chocolate bars instead, or try dark chocolate, white chocolate, or even peanut butter chips for variety. Nuts like walnuts or pecans make a great crunchy addition too.

This brownie cake is rich enough to serve alone, but vanilla ice cream or whipped cream makes it extra special. Fresh raspberries or strawberries cut through the chocolate intensity beautifully. For special occasions, drizzle with caramel or chocolate sauce and add a sprinkle of flaky sea salt on top for a gourmet touch.

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