These are the brownies of my childhood. The ones with the shiny, crackly top and the thick layer of chocolate ganache. The ones dotted with those tiny, colorful candy pieces that made every bite feel like a little celebration.
Advertisements1
I've spent years perfecting this recipe. The key is in the technique. You want that papery, crackly crust. You want the center to be dense and fudgy, not cakey. And you want the ganache to be glossy and set just right.
This recipe is straightforward. It uses simple ingredients. But the result is something truly special. Let's bake.
Why You'll Love This Recipe
About the Ingredients
1 cup (226g) unsalted butter
Melted and slightly cooled. Use European-style butter for extra richness.
1 1/2 cups (300g) granulated sugar
Regular white sugar works best for that crackly top.
3 large eggs, room temperature
Room temperature eggs emulsify better. If cold, place in warm water for 5 minutes.
1/2 cup (45g) Dutch-processed cocoa powder
Dutch-processed gives a deeper, smoother chocolate flavor. You can use regular cocoa, but the flavor will be less intense.
1/2 teaspoon salt
Fine sea salt balances the sweetness.
1/2 teaspoon baking powder
Adds a slight lift without making them cakey.
1 cup (125g) all-purpose flour
Spoon and level to avoid a dry brownie.
1/2 cup (113g) semisweet chocolate chips
For melting into the batter. Use high-quality chips for best flavor.
1/2 cup (113g) milk chocolate chips
For the ganache. You can use dark chocolate if you prefer a less sweet topping.
1/2 cup (120ml) heavy cream
For the ganache. Ensure it's warm but not boiling.
1/2 cup (85g) rainbow chocolate chips (or M&M's minis)
These are the iconic cosmic topping. You can find them in the baking aisle.
Tips & Tricks
- Do not overmix the batter after adding flour. Overmixing develops gluten, leading to a tough, cakey brownie.
- Use a light-colored metal pan for even baking. Glass or dark pans can cause the edges to overbake.
- Check for doneness early. The brownies are done when a toothpick inserted into the center comes out with a few moist crumbs, not wet batter.
- Let the brownies cool completely before adding the ganache. If the brownies are warm, the ganache will soak in and not set properly.
Pro Tips
Step-by-Step Instructions
1. Preheat and Prep Pan
Preheat your oven to 350°F (175°C). Line an 8×8-inch (20×20 cm) baking pan with parchment paper, leaving overhang on two sides for easy lifting.
2. Melt Butter and Chocolate
In a medium saucepan over low heat, melt the butter and 1/2 cup semisweet chocolate chips together, stirring constantly until smooth. Remove from heat and let cool slightly.
3. Whisk Sugar and Eggs
In a large bowl, whisk the sugar and eggs together until pale and slightly thickened, about 2 minutes. This helps create the shiny, crackly crust.
4. Combine Wet Ingredients
Pour the melted chocolate mixture into the egg mixture. Stir gently until fully combined.
5. Add Dry Ingredients
Sift the cocoa powder, salt, baking powder, and flour over the wet mixture. Gently fold with a spatula until just combined. Do not overmix.
6. Bake the Brownies
Pour the batter into the prepared pan and smooth the top. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs. The edges should be set and slightly pulling away from the pan.
7. Cool Completely
Let the brownies cool in the pan on a wire rack for at least 1 hour. This is essential for the ganache to set properly.
8. Make and Spread Ganache
Place the milk chocolate chips in a small bowl. Heat the heavy cream in a small saucepan until just simmering. Pour the hot cream over the chocolate chips and let sit for 2 minutes. Stir until smooth and glossy. Pour over the cooled brownies and spread evenly.
9. Add Toppings and Refrigerate
Immediately sprinkle the rainbow chocolate chips over the ganache. Refrigerate for 30 minutes, or until the ganache is set. Then cut into squares and enjoy.
Delicious Variations
Peanut Butter Swirl
Drop spoonfuls of peanut butter on top of the batter before baking and swirl with a knife.
Mint Cosmic Brownies
Add 1/2 teaspoon peppermint extract to the batter and use mint chocolate chips for the ganache.
Gluten-Free
Substitute the all-purpose flour with a 1:1 gluten-free baking flour blend.
How to Store Best Cosmic Brownies
Refrigerator
Store in an airtight container in the refrigerator for up to 5 days.
Freezer
Wrap individual brownies in plastic wrap and place in a freezer-safe bag for up to 3 months.
Reheating
Microwave a brownie for 10-15 seconds to soften before serving.
Frequently Asked Questions
Q: Why didn't my brownies have a crackly top?
The crackly top comes from beating the eggs and sugar together until pale and thick, and then baking at the right temperature. Make sure you whisk for the full 2 minutes and don't overmix after adding flour.
Q: Can I use regular cocoa powder instead of Dutch-processed?
Yes, you can use regular unsweetened cocoa powder. The brownies will be slightly less rich and have a lighter color, but they will still be delicious.
Q: How do I know when the brownies are done?
Insert a toothpick into the center. If it comes out with a few moist crumbs, they are done. If it comes out wet with batter, bake for another 2-3 minutes. The edges should be set.
Q: Can I make these brownies gluten-free?
Yes, simply swap the all-purpose flour for a 1:1 gluten-free baking flour blend. The texture might be slightly different, but they will still be fudgy and delicious.
Q: How do I cut clean brownie squares?
Use a sharp serrated knife and wipe it clean between each cut. For the cleanest cuts, chill the brownies in the refrigerator for at least 30 minutes before slicing.
I hope you enjoy these cosmic brownies as much as I do. They are perfect for sharing with friends or savoring with a quiet cup of coffee. Let me know how they turn out in the comments below. Breathe, then unplug.
Best Cosmic Brownies
Ultra-fudgy homemade cosmic brownies with a crackly top and chocolate ganache, studded with rainbow candy-coated chocolate pieces.
🧂 Ingredients
- 1 cup (226g) unsalted butter
- 1 1/2 cups (300g) granulated sugar
- 3 large eggs, room temperature
- 1/2 cup (45g) Dutch-processed cocoa powder
- 1/2 teaspoon salt
- 1/2 teaspoon baking powder
- 1 cup (125g) all-purpose flour
- 1/2 cup (113g) semisweet chocolate chips
- 1/2 cup (113g) milk chocolate chips
- 1/2 cup (120ml) heavy cream
- 1/2 cup (85g) rainbow chocolate chips (or M&M's minis)
📋 Instructions
- 1Preheat and Prep Pan — Preheat your oven to 350°F (175°C). Line an 8×8-inch (20×20 cm) baking pan with parchment paper, leaving overhang on two sides for easy lifting.
- 2Melt Butter and Chocolate — In a medium saucepan over low heat, melt the butter and 1/2 cup semisweet chocolate chips together, stirring constantly until smooth. Remove from heat and let cool slightly.
- 3Whisk Sugar and Eggs — In a large bowl, whisk the sugar and eggs together until pale and slightly thickened, about 2 minutes. This helps create the shiny, crackly crust.
- 4Combine Wet Ingredients — Pour the melted chocolate mixture into the egg mixture. Stir gently until fully combined.
- 5Add Dry Ingredients — Sift the cocoa powder, salt, baking powder, and flour over the wet mixture. Gently fold with a spatula until just combined. Do not overmix.
- 6Bake the Brownies — Pour the batter into the prepared pan and smooth the top. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs. The edges should be set and slightly pulling away from the pan.
- 7Cool Completely — Let the brownies cool in the pan on a wire rack for at least 1 hour. This is essential for the ganache to set properly.
- 8Make and Spread Ganache — Place the milk chocolate chips in a small bowl. Heat the heavy cream in a small saucepan until just simmering. Pour the hot cream over the chocolate chips and let sit for 2 minutes. Stir until smooth and glossy. Pour over the cooled brownies and spread evenly.
- 9Add Toppings and Refrigerate — Immediately sprinkle the rainbow chocolate chips over the ganache. Refrigerate for 30 minutes, or until the ganache is set. Then cut into squares and enjoy.
Ingrid explores mindful technology use and digital minimalism, helping readers reclaim focus. She writes about practical habits to reduce screen time and improve digital well-being.
