This rich, fudgy brownie base combines melted butter, granulated and brown sugar, cocoa and eggs, baked 23–25 minutes until edges are set and center remains slightly soft. After cooling, pour a silky ganache made by pouring hot cream over chopped chocolate and butter, spread evenly, scatter candy-coated chocolates and chill until set. Slice into 12 bars; a pinch of espresso powder enhances depth and a 1:1 gluten-free flour swap works.
The smell of cocoa and melting butter has a way of pulling people into the kitchen faster than any dinner bell, and these gourmet cosmic brownies proved that truth one rainy Saturday when my roommate wandered in, mid yawn, and didnt leave until the pan was empty.
I brought a batch of these to a friends potluck last fall and watched three adults quietly argue over who got the corner piece with the most candy coating.
Ingredients
- 170 g unsalted butter, melted: Use good butter here because its the backbone of every rich bite.
- 200 g granulated sugar plus 100 g light brown sugar, packed: The blend gives you a chewy center with caramel depth.
- 2 large eggs: Room temperature eggs blend more smoothly into the batter.
- 1 tsp pure vanilla extract: Never skip this, it rounds out the chocolate beautifully.
- 80 g unsweetened cocoa powder: Sift it to avoid any bitter lumps hiding in your brownies.
- 80 g all purpose flour: Less flour than you think is what keeps them fudgy.
- Half tsp fine sea salt: Salt makes chocolate taste more like itself.
- 115 g semi sweet chocolate, chopped: Chop it yourself for the smoothest ganache melt.
- 120 ml heavy cream: Heat it gently because boiling cream will seize your chocolate.
- 15 g unsalted butter for ganache: This adds that gorgeous mirror shine on top.
- 50 g rainbow candy coated chocolate chips: The nostalgic crunch that makes these cosmic.
Instructions
- Set the stage:
- Preheat your oven to 175 degrees C and line an 8x8 inch pan with parchment, letting the edges hang over like handles.
- Build the base:
- Whisk melted butter with both sugars in a large bowl until the mixture looks glossy and inviting.
- Add the life:
- Beat in the eggs one at a time with the vanilla, whisking until the batter lightens slightly in color.
- Fold in the dry:
- Sift cocoa powder, flour, and salt directly into the bowl, then fold gently until just combined.
- Bake with patience:
- Pour the batter into your prepared pan, smooth the top, and bake for 23 to 25 minutes until edges are set but the center still jiggles faintly.
- Cool completely:
- Let the brownie base cool entirely in the pan on a wire rack while you resist every urge to cut in early.
- Make the ganache:
- Place chopped chocolate and butter in a heatproof bowl, then pour steaming hot cream over it and wait two minutes before stirring smooth.
- Top and finish:
- Spread the ganache evenly over your cooled brownies, scatter candy coated chocolates across the surface, and chill for at least 30 minutes before slicing.
There is something quietly magical about lifting that parchment paper out of the pan and revealing a perfect slab of glossy, candy studded chocolate.
Texture and Serving Tips
Serve these chilled if you want clean, dense slices that photograph beautifully.
Making Them Your Own
Swap the rainbow candies for chopped toasted hazelnuts or flaky sea salt if you want a more grown up finish.
Storage and Freshness
These bars stay wonderfully moist for up to five days in an airtight container.
- Freeze sliced bars between layers of parchment for up to two months.
- Let frozen bars thaw at room temperature for about an hour before eating.
- Never microwave them because the ganache will melt unevenly and the candy coating will bleed.
Share these with someone who remembers the original cosmic brownies and watch their face light up with recognition and surprise at how good homemade can be.
Recipe FAQs
- → How do I get a fudgy center instead of cakey?
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Use melted butter, avoid overmixing once flour is added, and remove from the oven when edges are set but the center still looks slightly underbaked; it will finish setting as it cools.
- → Can I substitute different chocolate for the ganache?
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Yes. Semi-sweet gives balance; use dark for deeper flavor or milk for a sweeter, creamier finish. Adjust cream proportion slightly for desired thickness.
- → What prevents ganache from seizing?
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Heat the cream until just steaming, pour over finely chopped chocolate, let sit 1–2 minutes, then stir gently from the center outward. Avoid boiling the cream and keep water away from the chocolate.
- → How can I cut clean, neat bars?
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Chill the set ganache thoroughly so it firms up, lift the slab with the parchment overhang, use a sharp knife warmed under hot water and wiped dry between cuts for smooth edges.
- → How should I store the bars and how long do they keep?
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Store chilled in an airtight container for up to 5 days. For serving, allow a short rest at room temperature for softer texture. They can be frozen up to 1 month, thaw in the fridge.
- → How do I make these suitable for gluten-free diets?
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Replace the all-purpose flour with a 1:1 gluten-free flour blend that includes xanthan or guar; avoid overmixing and watch baking time, as GF blends sometimes bake faster or drier.