Cosmic Brownie Heart Dupe
Cosmic Brownie Heart Dupe! is a medium American recipe that serves 12. 250 calories per serving. Recipe by Gregory Mason on YouTube.
Prep: 20 min | Cook: 18 min | Total: 48 min
Cost: $7.32 total, $0.61 per serving
Ingredients
- 0.5 cup Unsalted Butter (melted in a saucepan over low heat)
- 1 cup Brown Sugar (packed)
- 1 cup Granulated Sugar (white granulated)
- 2 Large Eggs (room temperature)
- 2 Egg Yolks (separated from whites)
- 1 tsp Vanilla Extract (pure vanilla extract)
- 1.25 cup All-Purpose Flour (sifted)
- 1.25 cup Unsweetened Cocoa Powder (high‑quality, such as Ghirardelli)
- 1 tsp Cornstarch (helps keep brownies tender)
- 1 tsp Salt (kosher or sea salt)
- 0.25 cup Vegetable Oil (neutral‑flavored oil)
- 1 cup Heavy Cream (35% milkfat, for ganache)
- 1 cup Semi‑Sweet Chocolate Chips (60% cacao, high‑quality)
- 2 tbsp Rainbow Sprinkles (optional, for topping)
Instructions
Melt Butter
Place ½ cup unsalted butter in a saucepan over low heat and melt gently, stirring occasionally to prevent browning.
Time: PT2M
Combine Sugars
Add 1 cup brown sugar and 1 cup granulated sugar to the melted butter. Stir continuously until the mixture is smooth and the sugars are fully dissolved.
Time: PT2M
Add Eggs and Vanilla
Whisk in 2 whole eggs, 2 egg yolks, and 1 tsp vanilla extract until fully incorporated and the batter looks glossy.
Time: PT2M
Mix Dry Ingredients
In a separate bowl, whisk together 1 ¼ cup all‑purpose flour, 1 ¼ cup unsweetened cocoa powder, 1 tsp cornstarch, and 1 tsp salt.
Time: PT1M
Combine Wet and Dry, Add Oil
Fold the dry mixture into the wet mixture until just combined. Drizzle in ¼ cup vegetable oil and stir until the batter is thick, shiny, and slightly glossy.
Time: PT3M
Portion Batter
Spoon the batter into silicone baking liners or molds placed on a baking sheet, filling each about ¾ full.
Time: PT2M
Bake Brownies
Bake in a pre‑heated oven at 350°F for 18 minutes, checking at 15 minutes. The tops should look set but the center will still be slightly soft.
Time: PT18M
Temperature: 350°F
Prepare Ganache
While the brownies bake, heat 1 cup heavy cream in a small saucepan until just scalding (small bubbles form around the edges). Remove from heat and pour over 1 cup chocolate chips in a bowl. Let sit 2 minutes, then whisk until smooth and glossy.
Time: PT5M
Cool and Top
Allow the baked brownies to cool in the pan for about 10 minutes. Then spread the ganache evenly over each brownie using a spatula. Sprinkle rainbow sprinkles on top if desired.
Time: PT10M
Set Ganache
Place the topped brownies in the refrigerator for 15 minutes to let the ganache firm up.
Time: PT15M
Serve
Pop the brownies out of the liners, arrange on a platter, and serve. Store leftovers as directed.
Time: PT1M
Nutrition Facts
- Calories
- 250
- Protein
- 3g
- Carbohydrates
- 30g
- Fat
- 14g
- Fiber
- 3g
Dietary info: Vegetarian, Contains Gluten, Contains Dairy, Contains Eggs
Allergens: Gluten, Dairy, Eggs, Soy (in chocolate chips)
Ingredient Substitutions
- Instead of Unsalted Butter: Margarine, Coconut oil
- Instead of Brown Sugar: Dark brown sugar, Coconut sugar
- Instead of Granulated Sugar: Cane sugar
- Instead of Large Eggs: Egg replacer (for vegans)
- Instead of Egg Yolks: Extra egg whites (not recommended)
- Instead of Vanilla Extract: Vanilla bean, Almond extract (use half amount)
- Instead of All-Purpose Flour: Gluten‑free flour blend
- Instead of Unsweetened Cocoa Powder: Dutch‑processed cocoa powder
- Instead of Cornstarch: Arrowroot powder
- Instead of Salt: Table salt (use ¾ tsp)
- Instead of Vegetable Oil: Melted coconut oil, Melted butter
- Instead of Heavy Cream: Half‑and‑half (less rich), Coconut cream
- Instead of Semi‑Sweet Chocolate Chips: Chopped dark chocolate
- Instead of Rainbow Sprinkles: Colored sanding sugar
Equipment Needed
- Saucepan
- Mixing Bowl
- Whisk
- Spatula
- Silicone Baking Liners or Molds
- Baking Sheet
- Oven
- Measuring Cups
- Measuring Spoons
- Refrigerator
Critical Steps — Do Not Skip
- Melt butter without browning
- Mix until batter is thick, shiny, and glossy
- Do not over‑bake; brownies should remain fudgy
- Heat cream just to scalding and whisk ganache promptly
Chef Tips from the Video
- Use high‑quality cocoa powder for deeper chocolate flavor.
- Sift the dry ingredients twice to ensure a lump‑free batter.
- For a glossy finish, drizzle a thin layer of melted butter over the ganache before chilling.
Troubleshooting
Brownies are dry and crumbly.
Do not over‑bake; check at 15 minutes. If already baked, add a tablespoon of oil to the batter next time for extra moisture.
Ganache looks grainy or separates.
Make sure the cream is only scalded, not boiled, and whisk immediately after adding the chocolate. If grainy, gently re‑heat over a double boiler while whisking.
Brownies spread too thin in the liners.
Fill liners only ¾ full and use silicone molds that hold shape. A thicker batter will stay higher.
Storage
Refrigerator: Store in an airtight container for up to 3 days.
Freezer: Wrap tightly and freeze for up to 2 months.
Room temperature: Best eaten the same day; can sit out up to 24 hours.
Make-Ahead Tips
- Ganache can be prepared a day ahead and kept refrigerated; gently re‑warm before spreading.
- Baked brownies can be stored in the fridge and topped with fresh ganache later.
Frequently Asked Questions
What is the cultural significance and history of Cosmic Brownies in American snack culture?
Cosmic Brownies originated in the 1990s as a popular snack sold in convenience stores and school cafeterias across the United States. Their bright rainbow sprinkles and fudgy texture made them a nostalgic treat for a generation that grew up with packaged desserts.
How did the original Cosmic Brownies become associated with the “Galentine’s Day” trend?
Galentine’s Day, a celebration of female friendships, gained popularity on social media in the 2010s. The colorful, shareable nature of Cosmic Brownies makes them a perfect, playful dessert for the occasion, leading many creators to feature them in Galentine’s brunch spreads.
What are the traditional regional variations of fudgy brownies like Cosmic Brownies in the United States?
While the classic version uses chocolate chips and rainbow sprinkles, some regions add peanut butter swirls, caramel ribbons, or use dark chocolate for a richer flavor. In the Pacific Northwest, a maple‑infused brownie variation is popular, whereas the South often incorporates pecans.
What authentic ingredients are used in the original Cosmic Brownies compared to this homemade dupe?
The original packaged Cosmic Brownies contain processed vegetable oils, artificial colors, and preservatives. This homemade dupe uses real butter, high‑quality cocoa, pure vanilla, and natural rainbow sprinkles, eliminating additives while preserving the signature fudgy texture.
What other American desserts pair well with Cosmic Brownie Dupe for a Galentine’s Day brunch?
Pair the brownies with classic brunch items such as fluffy pancakes, fresh fruit parfaits, or a citrus‑y mimosa. A side of vanilla bean yogurt and a drizzle of honey balances the rich chocolate flavor.
Why does this Cosmic Brownie Dupe recipe use both butter and oil instead of just one fat?
Butter provides flavor and a glossy texture, while oil adds extra moisture without solidifying when the brownies cool. The combination creates the signature fudgy, “juicy” crumb that mimics the store‑bought version.
What are the most common mistakes to avoid when making Cosmic Brownie Dupe at home?
Common errors include over‑baking, which turns the brownies hard; overheating the cream for ganache, which causes a grainy texture; and over‑mixing the batter, which can incorporate too much air and make the brownies cakey.
How do I know when the Cosmic Brownies are done baking?
The tops should look set and slightly cracked, but a gentle touch in the center will still feel soft. Insert a toothpick; it should come out with a few moist crumbs, not clean batter.
Can I make the Cosmic Brownie Dupe ahead of time and how should I store them?
Yes. Bake the brownies, let them cool, spread the ganache, and refrigerate for 15 minutes. Store the finished brownies in an airtight container in the fridge for up to three days or freeze for longer storage.
What does the YouTube channel Gregory Mason specialize in?
The YouTube channel Gregory Mason focuses on fun, approachable home‑cooking tutorials that often remix nostalgic snack foods and classic desserts with a modern twist, emphasizing clear step‑by‑step instructions and playful presentation.
Last updated: September 1, 2026
