Chocolate Brownie Cake with Cake Mix (Easy Fudgy Recipe)

Inspired by a popular recipe shared in the Box Cake Mix Magic group, this is my KMarie Kitchen twist on a viral favorite. This Chocolate Brownie Cake combines rich brownies and moist chocolate cake into one irresistible dessert, with a few extra touches to make it even more indulgent and perfect for Sunday dinner, holidays, or anytime you need something chocolatey and comforting. So, make sure you come join the Box Cake Mix Magic Group so you can get inspired for your baking journey!

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Why You’ll Love This Chocolate Brownie Cake

If you love fudgy brownies and soft, fluffy cake, this recipe gives you the best of both worlds. It’s rich, decadent, and topped with a silky chocolate glaze that takes it over the top.

• Uses simple box mixes for convenience
• Perfect balance of fudgy and fluffy textures
• Crowd-pleasing dessert for any occasion
• Easy chocolate glaze made from scratch

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Ingredients

For the Cake

• 1 box chocolate cake mix
• 1 box brownie mix
• 5 large eggs
• 1 ¼ cups milk
• 1 cup oil
• 3–4 tablespoons sour cream

For the Chocolate Glaze

• ¼ cup milk
• ¼ cup butter
• 3 cups powdered sugar
• ¼ cup cocoa powder
• ½ cup chocolate chips

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Instructions

Step 1: Prepare the Batter

Preheat your oven to 325°F. Grease a bundt pan or 9×13 baking dish.

In a large mixing bowl, combine the chocolate cake mix and brownie mix. Add eggs, milk, oil, and sour cream. Mix until smooth and well combined, but do not overmix.

Step 2: Bake the Cake

Pour the batter into your prepared pan and spread evenly.

Bake for 45–55 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.

Allow the cake to cool slightly before adding the glaze.

Step 3: Make the Chocolate Glaze

In a saucepan over medium heat, combine milk and butter. Stir until melted.

Whisk in cocoa powder and powdered sugar until smooth. Add chocolate chips and continue stirring until melted and glossy.

Step 4: Glaze the Cake

While the glaze is still warm, pour it over the cake to create a rich drizzle. Let it set before serving.

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Tips for the Best Chocolate Brownie Cake

• Don’t overbake—this cake is best when slightly fudgy in the center
• Use a good quality cocoa powder for a richer chocolate flavor
• Add extra chocolate chips to the batter for even more indulgence
• Let the glaze cool slightly if you want a thicker drizzle

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Variations

• Chocolate Lovers: Add 1 cup chocolate chips to the batter
• Mocha Flavor: Add 1 teaspoon espresso powder
• Caramel Drizzle: Drizzle caramel sauce over the chocolate glaze
• Nuts: Fold in chopped pecans or walnuts for crunch

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How to Store

Store in an airtight container at room temperature for up to 3 days or refrigerate for up to 5 days. Warm slices in the microwave for that fresh-out-the-oven taste.

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Frequently Asked Questions

Can I use water instead of milk? Yes, but milk adds richness and better flavor.

Can I make this in a bundt pan? Absolutely! Just be sure to grease it well.

Can I freeze this cake? Yes, wrap tightly and freeze for up to 2 months.

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Sweet Endings

Recipes like this remind me how food brings us together—even in online communities like Box Cake Mix Magic. I love taking a shared favorite and adding my own touch, turning it into something that feels like home in my kitchen. Speaking of online communities, I am excited to share I am featured on the Top Black Instagram Influencers list for 2026 so make sure you check out the list for other foodies to follow!

This Chocolate Brownie Cake is rich, comforting, and made to be shared—whether it’s for Sunday dinner, a celebration, or just because you deserve something sweet.

For more comforting, easy recipes, visit KMarieKitchen.com where every dish tells a story.