Homemade Cosmic Brownies
Homemade Cosmic Brownies is a easy American recipe that serves 12. 250 calories per serving. Recipe by Laura in the Kitchen on YouTube.
Prep: 25 min | Cook: 22 min | Total: 1 hr 2 min
Cost: $7.36 total, $0.61 per serving
Ingredients
- 1 cup Granulated Sugar (white granulated)
- 1 cup Brown Sugar (packed)
- 1 cup All-Purpose Flour (sifted)
- 0.75 cup Unsweetened Cocoa Powder (natural, unsweetened)
- 1 tsp Instant Espresso Powder (adds depth of flavor)
- 1 tsp Baking Powder (leavening agent)
- 0.5 tsp Salt (kosher or table salt)
- 2 tsp Vanilla Extract (shaken well before measuring)
- 0.5 cup Milk (whole or 2%)
- 0.5 cup Unsalted Butter (melted, cooled slightly)
- 2 large Eggs (room temperature)
- 1 cup Semi‑Sweet Chocolate Chips (good quality)
- 0.5 cup Heavy Cream (hot before mixing)
- 0.5 cup Mini M&Ms (optional colorful topping)
- 0.5 cup Chopped Walnuts (optional for walnut version)
Instructions
Preheat Oven and Prepare Pan
Set the oven to 350°F. Spray the 9×13‑inch glass baking pan with non‑stick spray, line the bottom with parchment paper, and lightly spray the parchment.
Time: PT5M
Temperature: 350°F
Combine Sugars, Eggs, and Vanilla
In a large mixing bowl, whisk together the granulated sugar, brown sugar, eggs, and vanilla extract until smooth and slightly fluffy.
Time: PT5M
Add Wet Ingredients
Stir in the milk and melted butter to the sugar‑egg mixture until just incorporated.
Time: PT5M
Add Dry Ingredients
Sift together the flour, cocoa powder, espresso powder, baking powder, and salt. Sprinkle the dry mix over the wet mixture and gently fold until just combined—do not over‑mix.
Time: PT3M
Transfer Batter to Pan
Pour the batter into the prepared pan and use a spatula to smooth the top into an even layer.
Time: PT2M
Bake Brownies
Place the pan in the preheated oven and bake for 20‑25 minutes, checking at 20 minutes. The brownies are done when the surface looks set and a gentle finger press leaves a slight give.
Time: PT22M
Temperature: 350°F
Prepare Chocolate Glaze While Baking
While the brownies bake, heat the heavy cream in a microwave‑safe bowl for 30 seconds until hot but not boiling.
Time: PT1M
Melt Chocolate Chips
Pour the hot cream over the semi‑sweet chocolate chips, let sit for a minute, then stir until the mixture is completely smooth and glossy.
Time: PT4M
Glaze the Brownies
When the brownies are out of the oven, immediately pour the chocolate glaze over the top, spreading it evenly with a spatula.
Time: PT3M
Add Toppings
Scatter the mini M&Ms (or chopped walnuts for a walnut version) over the still‑wet glaze.
Time: PT2M
Chill to Set Glaze
Transfer the pan to the refrigerator and let the brownies chill for about 1 hour until the glaze is firm.
Time: PT1H
Cut and Serve
Remove the brownies from the pan using the parchment overhang, place on a cutting board, and cut into 12 squares. Serve at room temperature or chilled.
Time: PT5M
Nutrition Facts
- Calories
- 250
- Protein
- 3g
- Carbohydrates
- 30g
- Fat
- 12g
- Fiber
- 2g
Dietary info: Vegetarian
Allergens: Eggs, Dairy, Wheat, Soy
Last updated: April 18, 2026






