Cosmic Brownie Cheesecake

Featured in Sweet Moments of Joy.

Make a fudgy brownie crust, top with chocolate cheesecake filling, bake in a water bath, chill completely, then finish with chocolate ganache and colorful candy-coated chocolate pieces.
Recipes Fives Halima
Updated on Sun, 13 Apr 2025 17:39:03 GMT
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Cosmic Brownie Cheesecake transforms childhood nostalgia into an elevated dessert experience with multiple layers of chocolate decadence. The foundation begins with a chewy, fudgy brownie crust that supports a silky chocolate cheesecake filling, all crowned with glossy chocolate ganache and signature rainbow candy chips. Each bite delivers the perfect balance of chewy brownie, creamy cheesecake, and the delightful crunch of colorful sprinkles that instantly reconnects you with those beloved packaged treats.

I created this recipe during a particularly dreary winter when I found myself craving childhood comfort foods. The first time I served it at my sister's birthday gathering, my brother-in-law actually stopped mid-conversation when he took his first bite. Three people immediately pulled out their phones to take pictures, and my usually reserved father asked for seconds before finishing his first slice. What surprised me most was how the colorful sprinkles transformed the mood of the entire table – suddenly everyone was sharing stories about their favorite childhood treats and forgotten lunchbox memories.

Chocolate Components

  • Bittersweet chocolate: Creates perfect foundation for brownie crust without overwhelming sweetness. Look for bars with 60-70% cacao content for richest flavor profile.
  • Semi-sweet chocolate: Provides ideal balance for cheesecake filling and ganache topping. Chips work perfectly but premium bar chocolate creates even smoother melting.
  • Dutch-processed cocoa powder: Delivers deeper color and smoother chocolate flavor than natural cocoa. Its alkalized processing removes acidity that can interfere with creamy texture.
  • Full-fat cream cheese: Forms backbone of cheesecake filling with necessary fat content for proper setting. Philadelphia brand consistently delivers reliable results for texture.
  • Sour cream: Introduces subtle tanginess that balances chocolate richness while contributing to silky texture. Full-fat version provides best moisture retention.
  • Rainbow candy chips: Complete the authentic cosmic brownie experience with their distinctive crunch and color. These can typically be found in baking aisles or specialty cake decorating sections.

Creation Process

Begin with brownie base
Melt bittersweet chocolate with butter using gentle microwave intervals, stirring frequently. Whip eggs, sugar, and vanilla until pale and notably increased in volume. Stream chocolate mixture into eggs while beating continuously. Fold dry ingredients carefully until just combined, maintaining brownie density.
Prepare springform setup
Pour brownie batter into parchment-lined springform pan, smoothing evenly. Bake until center remains slightly fudgy but edges are set. Allow partial cooling while preparing water bath for cheesecake environment.
Craft chocolate filling
Melt semi-sweet chocolate until completely smooth, allowing slight cooling. Beat room temperature cream cheese with sugar until completely smooth and fluffy. Incorporate melted chocolate, vanilla, cocoa powder and salt at low speed. Fold in sour cream until fully integrated. Add eggs individually, mixing minimally after each addition.
Employ proper baking technique
Pour cheesecake mixture over partially cooled brownie crust. Place springform pan on oven rack positioned directly above water bath. Bake until edges set but center retains slight jiggle. Turn off oven, crack door, and allow gradual cooling inside oven before room temperature rest.
Create glossy ganache
Heat heavy cream just until bubbles form around edges. Pour over waiting chocolate chips, allowing brief melting period before whisking. Apply gentle pressure when stirring to maintain smooth, glossy appearance without incorporating air bubbles.
Apply finishing touches
Release sides of springform pan after complete chilling. Spread cooled ganache across top surface, allowing slight drip around edges for visual appeal. Immediately apply rainbow chips while ganache remains tacky enough for adherence.
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My grandmother always insisted that chocolate desserts should be served slightly below room temperature for optimal flavor development. When I first attempted this recipe, I made the mistake of rushing the chilling process and serving it cold from the refrigerator. The following day, I discovered that allowing the slices to sit for fifteen minutes before serving completely transformed the experience – the brownie softened perfectly, the cheesecake became silkier, and the flavors bloomed remarkably. Now I always warn guests to resist immediate cutting, promising the brief wait delivers substantial rewards. This patience has become my secret ingredient.

Serving Suggestions

Warm chocolate sauce drizzled over individual slices creates beautiful presentation and temperature contrast. Fresh raspberries alongside each serving provide bright acidity that balances rich chocolate elements. Consider offering coffee with hint of cinnamon which enhances chocolate depth throughout multiple layers.

Flavor Variations

Incorporate espresso powder into brownie base for coffee-chocolate experience that enhances overall chocolate intensity. Swap traditional cosmic chips with crushed Reese's Pieces for peanut butter flavor profile throughout colorful topping. Add thin layer of salted caramel between brownie and cheesecake layers for sweet-salty dimension.

Storage Success

Refrigerate covered cheesecake up to five days without quality decline. Remove candy topping before storage as colors may bleed into ganache surface. For longer preservation, freeze individual slices with parchment between each for easy single-serving thawing. Allow frozen slices fifteen minutes at room temperature after refrigerator thawing for optimal texture restoration.

The moment I realized this cheesecake had truly captured something special was during a neighborhood potluck when an elderly gentleman approached me privately. He explained that his late wife had always packed cosmic brownies in his lunch during their fifty years of marriage, and tasting this dessert brought tears to his eyes from the unexpected memory. Food connects us through time in remarkable ways – this isn't just chocolate on chocolate on chocolate (though that alone would be magnificent). It's childhood wonder translated into sophisticated form while maintaining that special magic that made us fall in love with those foil-wrapped treats so many years ago.

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Frequently Asked Questions

→ Why do I need to use a water bath for this cheesecake?
A water bath serves two important purposes: it prevents cracks by creating a humid environment in the oven, and it ensures gentle, even heating. This gentle cooking method is essential for achieving that perfectly smooth, creamy texture that makes cheesecakes so luxurious. Without a water bath, your cheesecake is more likely to crack, rise unevenly, and have a drier texture.
→ Can I use regular cocoa powder instead of black cocoa for the brownie crust?
Yes, you can use regular unsweetened cocoa powder for the entire recipe if you don't have black cocoa. The crust will be lighter in color but still delicious. For a closer match to the dark color of cosmic brownies, you could use Dutch-processed cocoa powder, which has a darker color and milder flavor than natural cocoa powder.
→ What candy-coated chocolate pieces work best for the topping?
M&M's Minis work perfectly as they closely resemble the colorful chips on traditional cosmic brownies. You could also use regular M&M's chopped into smaller pieces, or Sixlets. For the most authentic look, choose candy pieces in bright rainbow colors (red, orange, yellow, green, blue) rather than seasonal or specialized color mixes.
→ Why did my ganache turn out grainy or separated?
Ganache can become grainy if the chocolate gets too hot or if liquid is introduced too quickly. To prevent this, make sure your cream is just hot enough to melt the chocolate (not boiling), and let the chocolate and cream sit together for a few minutes before stirring. Start stirring from the center and move outward gradually. If your ganache does separate, try adding a splash of warm milk while whisking vigorously.
→ Can I freeze this cheesecake?
Yes! This cheesecake freezes beautifully. Freeze the cheesecake (without the ganache and candy topping) by wrapping it tightly in plastic wrap and then aluminum foil. It will keep for up to 2 months. Thaw overnight in the refrigerator, then add the fresh ganache and candy toppings before serving for the best appearance and texture.

Nostalgic Chocolate Rainbow Dessert

A nostalgic dessert that combines a fudgy brownie base with rich chocolate cheesecake and is topped with glossy ganache and colorful candy chips - just like the beloved childhood snack cakes!

Prep Time
15 Minutes
Cook Time
90 Minutes
Total Time
105 Minutes
By: Halima

Category: Decadent Desserts

Difficulty: Intermediate

Cuisine: American

Yield: 14 Servings

Dietary: Vegetarian

Ingredients

→ Brownie Crust

01 150 grams bittersweet chocolate
02 76 grams unsalted butter
03 183 grams granulated sugar
04 2 large eggs, room temperature
05 2 tsp vanilla extract
06 62 grams all purpose flour
07 27 grams cocoa powder
08 ½ tsp salt

→ Cheesecake Filling

09 226 grams semi-sweet chocolate chips
10 680 grams full fat cream cheese, softened
11 140 grams granulated sugar
12 2 tsp vanilla extract
13 1 tbsp cocoa powder
14 ½ tsp salt
15 140 grams sour cream, room temperature
16 3 large eggs, room temperature

→ Chocolate Ganache

17 200 grams semi-sweet chocolate chips
18 200 grams heavy cream
19 2 tbsp candy-coated chocolate pieces

Instructions

Step 01

Preheat oven to 350°F (175°C). Line a 9-inch springform pan with parchment paper and grease the sides. Melt the bittersweet chocolate and butter together in a microwave-safe bowl or over a double boiler. Stir in sugar until combined, then add eggs one at a time, mixing well after each addition. Stir in vanilla extract. In a separate bowl, combine flour, cocoa powder, and salt. Gradually add to the chocolate mixture and stir until just combined. Pour the brownie batter into the prepared pan and spread evenly. Bake for 20-25 minutes or until a toothpick inserted comes out with a few moist crumbs. Allow to cool while preparing the filling.

Step 02

Reduce oven temperature to 325°F (163°C). Melt the chocolate chips in the microwave or over a double boiler until smooth. Set aside to cool slightly. In a large bowl, beat cream cheese until smooth and creamy. Add sugar and beat until combined. Mix in vanilla extract, cocoa powder, and salt. Add the melted chocolate and mix until fully incorporated. Stir in sour cream. Add eggs one at a time, beating on low speed just until each is incorporated. Pour the filling over the cooled brownie crust.

Step 03

Place the springform pan in a larger baking dish. Fill the outer dish with hot water about halfway up the sides of the springform pan to create a water bath. Bake for 60-70 minutes or until the edges are set but the center still has a slight jiggle. Turn off the oven, crack the door open, and let the cheesecake cool in the oven for 1 hour. Remove from the oven and water bath, run a knife around the edges, and let cool completely at room temperature.

Step 04

Once the cheesecake has cooled to room temperature, cover and refrigerate for at least 6 hours or overnight to set completely.

Step 05

When ready to serve, prepare the ganache by heating the heavy cream until just simmering. Pour over the chocolate chips and let sit for 2-3 minutes. Stir until smooth and glossy. Allow to cool slightly until it thickens but is still pourable. Pour the ganache over the chilled cheesecake, spreading it to the edges and allowing some to drip down the sides. Sprinkle the candy-coated chocolate pieces on top. Return to the refrigerator to set the ganache for about 30 minutes before serving.

Notes

  1. This cosmic brownie cheesecake is the ultimate chocolate cheesecake. It has a fudgy brownie crust with a chocolate cheesecake filling that's creamy and will melt in your mouth. Just like the nostalgic brownies, it's topped with decadent chocolate ganache and colorful candy-coated chips!
  2. For the best texture, make sure all refrigerated ingredients are at room temperature before mixing.
  3. The water bath helps prevent cracks in your cheesecake and ensures even cooking.
  4. This cheesecake can be made up to 3 days in advance and stored in the refrigerator.

Tools You'll Need

  • 9-inch springform pan
  • Parchment paper
  • Larger baking dish (for water bath)
  • Mixing bowls
  • Electric mixer
  • Microwave or double boiler
  • Measuring cups and spoons or kitchen scale
  • Spatula

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains dairy (butter, cream cheese, sour cream, heavy cream)
  • Contains eggs
  • Contains gluten (flour)
  • May contain soy (chocolate chips)

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 485
  • Total Fat: 34 g
  • Total Carbohydrate: 42 g
  • Protein: 8 g