cosmic brownies

cosmic brownies is a medium American recipe that serves 12. 250 calories per serving. Recipe by Tim Laielli on YouTube.

Prep: 30 min | Cook: 25 min | Total: 3 hrs 10 min

Cost: $14.46 total, $1.20 per serving

Ingredients

  • 1 cup Unsalted Butter (for brownie batter, melted)
  • 2 cups Semi-Sweet Chocolate Chips (1 cup for batter, 1 cup for ganache)
  • 1.5 cups Granulated Sugar (adds sweetness and helps texture)
  • 0.5 cup Brown Sugar (packed, adds moisture)
  • 3 Large Eggs (room temperature)
  • 1 tsp Vanilla Extract (pure vanilla)
  • 0.75 cup All-Purpose Flour (sifted)
  • 0.5 cup Unsweetened Cocoa Powder (high‑quality Dutch‑process)
  • 0.25 tsp Baking Powder
  • 0.25 tsp Salt
  • 0.75 cup Heavy Cream (for ganache, full‑fat)
  • 2 tbsp Unsalted Butter (for ganache) (cut into small pieces)
  • 0.25 cup Rainbow Sprinkles (for topping, the exact sprinkles used in the original Cosmic Brownies)

Instructions

  1. Preheat Oven & Prepare Pan

    Preheat the oven to 350°F (175°C). Line a 9×13‑inch baking pan with parchment paper, leaving an overhang on the sides for easy removal.

    Time: PT5M

    Temperature: 350°F

  2. Melt Butter and Chocolate

    Place 1 cup butter and 1 cup chocolate chips in a heatproof bowl over a saucepan of simmering water (double boiler). Stir constantly until completely smooth and glossy.

    Time: PT5M

  3. Combine Sugars, Eggs, and Vanilla

    In a large mixing bowl, whisk together granulated sugar, brown sugar, eggs, and vanilla extract until the mixture lightens slightly and is well‑combined.

    Time: PT5M

  4. Incorporate Melted Chocolate

    Pour the melted butter‑chocolate mixture into the sugar‑egg bowl. Stir gently until fully incorporated; the batter will be thick.

    Time: PT3M

  5. Fold in Dry Ingredients

    Sift together flour, cocoa powder, baking powder, and salt. Gently fold the dry mixture into the batter using a spatula until just combined—do not over‑mix.

    Time: PT5M

  6. Bake the Brownies

    Spread the batter evenly in the prepared pan. Bake for 25 minutes, or until the top looks set and a toothpick inserted in the center comes out with a few moist crumbs.

    Time: PT25M

    Temperature: 350°F

  7. Cool Slightly

    Remove the pan from the oven and let the brownies cool on a rack for about 15 minutes. This makes them sturdy enough to handle the ganache.

    Time: PT15M

  8. Prepare Chocolate Ganache

    In a saucepan, bring the heavy cream to a gentle simmer (just before it starts to boil). Remove from heat and pour over 1 cup chocolate chips in a heatproof bowl. Let sit 2 minutes, then stir until smooth. Add the 2 tbsp butter and continue stirring until the ganache is glossy and fully incorporated.

    Time: PT10M

  9. Frost and Sprinkle

    Spread the warm ganache evenly over the cooled brownies using a spatula. Immediately sprinkle the rainbow sprinkles over the top, covering the surface.

    Time: PT5M

  10. Chill to Set

    Place the frosted brownies in the refrigerator for at least 2 hours (or until the ganache is firm).

    Time: PT2H

  11. Cut and Serve

    Lift the brownies out of the pan using the parchment overhang. Transfer to a cutting board and cut into 12 even squares.

    Time: PT5M

Nutrition Facts

Calories
250
Protein
3 g
Carbohydrates
30 g
Fat
12 g
Fiber
2 g

Dietary info: Vegetarian

Allergens: Dairy, Eggs, Gluten

Last updated: April 18, 2026

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cosmic brownies

Recipe by Tim Laielli

Dense, fudgy brownies that bring back the nostalgic snack hierarchy of Cosmic Brownies, topped with a silky chocolate ganache and colorful sprinkles. Perfect for lunchboxes, parties, or any occasion where you want a brownie that stands out.

MediumAmericanServes 12

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Source Video
2h 43m
Prep
40m
Cook
24m
Cleanup
3h 47m
Total

Cost Breakdown

$14.46
Total cost
$1.20
Per serving

Critical Success Points

  • Melt butter and chocolate together over gentle steam to avoid scorching.
  • Do not over‑mix the batter after adding flour; keep it dense and fudgy.
  • Bake just until set; over‑baking creates a cakey texture.
  • Make ganache over simmering cream and stir until glossy.
  • Chill the frosted brownies long enough for the ganache to firm.

Safety Warnings

  • Hot ganache and simmering cream can cause severe burns; handle with care.
  • When using a double boiler, ensure the water does not touch the bowl to prevent scorching.

Frequently Asked Questions

Everything you need to know about this recipe

Q

What is the cultural significance and history of Cosmic Brownies in American snack culture?

A

Cosmic Brownies originated in the 1990s as a popular school‑yard treat, known for their dense, fudgy texture and bright sprinkles that made them easy to trade at lunch. They became a nostalgic icon of childhood snack hierarchies, symbolizing status on the cafeteria table.

cultural
Q

What are the traditional regional variations of dense fudgy brownies in the United States?

A

While the classic brownie is found nationwide, some regions add ingredients like peanut butter, caramel swirls, or extra chocolate chips. The Cosmic Brownie variation is distinguished by its extra‑dense crumb and a thick chocolate ganache topping with colorful sprinkles.

cultural
Q

How is the authentic Cosmic Brownie traditionally served in American school lunchrooms?

A

Traditionally, a single square is wrapped in wax paper or placed in a small lunchbox, allowing kids to trade it for other snacks. The brownies are served at room temperature or slightly chilled, with the ganache firm enough to hold the sprinkles without smearing.

cultural
Q

What occasions or celebrations are Cosmic Brownies traditionally associated with in American culture?

A

Cosmic Brownies are popular at birthday parties, school fundraisers, and casual get‑togethers where a portable, shareable dessert is desired. Their bright sprinkles also make them a fun addition to holiday snack tables.

cultural
Q

What makes Cosmic Brownies special or unique in American dessert cuisine?

A

Their hallmark is an ultra‑dense, almost fudge‑like crumb paired with a thick chocolate ganache that stays firm, plus the iconic rainbow sprinkles that give them a playful, eye‑catching look. This combination sets them apart from regular brownies.

cultural
Q

What are the most common mistakes to avoid when making Cosmic Brownies at home?

A

Common errors include over‑mixing the batter, which creates a cakey texture, over‑baking, which dries the brownies, and overheating the ganache, which can cause it to separate. Follow the critical steps for melting chocolate and chilling the ganache.

technical
Q

Why does this Cosmic Brownies recipe use a double‑boiler for the chocolate ganache instead of a microwave?

A

A double‑boiler provides gentle, even heat that prevents the chocolate from scorching or seizing, resulting in a smooth, glossy ganache. Microwaving can create hot spots that lead to grainy texture.

technical
Q

Can I make Cosmic Brownies ahead of time and how should I store them?

A

Yes. Bake the brownies up to 24 hours ahead, keep them covered at room temperature, then add the ganache and sprinkles just before serving. Store any leftovers in an airtight container in the refrigerator for up to five days.

technical
Q

What texture and appearance should I look for when the ganache is done?

A

The ganache should be smooth, glossy, and thick enough to coat the back of a spoon without dripping. When it cools slightly, it should set to a soft sheen that holds the sprinkles in place.

technical
Q

How do I know when the Cosmic Brownies are done baking?

A

The edges will look set and the top will have a matte finish. Insert a toothpick into the center; it should come out with a few moist crumbs but no wet batter. The brownies will continue to firm as they cool.

technical
Q

What does the YouTube channel Tim Laielli specialize in?

A

The YouTube channel Tim Laielli focuses on nostalgic snack recreations, quick comfort food recipes, and playful kitchen experiments that blend humor with practical cooking tips.

channel
Q

How does the YouTube channel Tim Laielli's approach to American snack recipes differ from other cooking channels?

A

Tim Laielli combines personal storytelling with step‑by‑step demonstrations, often highlighting the cultural backstory of classic snacks like Cosmic Brownies, whereas many other channels focus solely on technique without the nostalgic context.

channel

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