Keto Cosmic Brownies: A Low-Carb Take on a Childhood Classic

If you grew up in the ‘90s or early 2000s, there’s a good chance you remember tearing open a plastic-wrapped treat that brought pure joy: Cosmic Brownies. Fudgy, rich, and topped with colorful candy-coated chocolate chips, they were the stuff of lunchbox legends.

But now you’re doing keto, and sugar-loaded snacks are a thing of the past, right?

Wrong!

Thanks to this easy Keto Cosmic Brownies recipe, you can enjoy all that nostalgic fudgy goodness without blowing your carb count. Packed with chocolate, completely gluten-free, and only 3g net carbs per serving, this low-carb brownie recipe is a must for every keto dessert lover.

Why You'll Love This Keto Cosmic Brownie Recipe

• Fudgy & rich like the real thing

• No added sugar – uses keto-friendly sweeteners

• Only 3g net carbs per brownie

• Topped with sugar-free chocolate ganache & candy sprinkles

• Freezer-friendly and perfect for meal prep

• Totally nostalgic and fun for the whole family

Ingredients You’ll Need

For the Brownies:

• 1/2 cup unsalted butter, melted

• 1/2 cup almond flour

• 1/4 cup cocoa powder (unsweetened)

• 1/3 cup keto sweetener (like erythritol or allulose)

• 2 large eggs

• 1/2 tsp vanilla extract

• 1/4 tsp salt

• Optional: 1 tbsp brewed coffee (enhances chocolate flavor)

For the Ganache Topping:

• 1/3 cup heavy cream

• 1/2 cup sugar-free chocolate chips (Lily’s or ChocZero)

• 1 tbsp butter

• 1/2 tsp vanilla extract

For the “Cosmic” Candy Topping:

• 2 tbsp keto-friendly rainbow sprinkles or sugar-free chocolate coated candies (like ChocZero gems)

How to Make Keto Cosmic Brownies (Step-by-Step)

1. Preheat & Prepare Pan

Preheat your oven to 350°F (175°C). Line an 8x8 baking dish with parchment paper, leaving overhang for easy removal.

2. Mix the Brownie Batter

In a mixing bowl, combine melted butter, sweetener, eggs, vanilla, and optional coffee. Stir until smooth.
Add in almond flour, cocoa powder, and salt. Mix just until combined—don’t over-mix.

3. Bake

Pour the batter into the prepared dish and smooth the top. Bake for 18–22 minutes or until the center is just set. Do not overbake!

Let cool completely in the pan.

4. Make the Ganache

In a small saucepan over low heat, warm the heavy cream until it just starts to simmer. Remove from heat and stir in the sugar-free chocolate chips, butter, and vanilla extract. Stir until smooth.

5. Top the Brownies

Pour the ganache over the cooled brownies and spread evenly. While it’s still wet, sprinkle your keto-friendly rainbow gems or sprinkles on top.

6. Chill & Slice

Refrigerate for at least 1 hour to set the ganache. Then lift the brownies out using the parchment, slice into squares, and enjoy!

Keto Cosmic Brownie Macros (per brownie, makes 12)

Nutrient Amount Calories:160 Net Carbs: 3g Fat:15g Protein: 4g Fiber: 2g Sugar: 0g (sugar-free!)

Macros are estimates and may vary based on ingredients.

Pro Tips for Perfect Keto Brownies

• Don’t overbake! They should look slightly underdone when you pull them out—residual heat will finish the job.

• Want an extra fudgy texture? Add 2 tbsp of unsweetened Greek yogurt or sour cream to the batter.

• Use room temperature eggs for a smoother mix.

• Want thicker brownies? Bake in a smaller 6x6 pan and increase bake time by 3–5 minutes.

• Store in the fridge for up to 5 days or freeze for up to 3 months.

Why These Brownies are Truly “Cosmic” on Keto

What makes these brownies so magical is that they give you the childlike joy of a store-bought treat—without the sugar crash.

You get:

• That signature dense, chewy texture

• A glossy ganache topping

• A colorful crunch from sugar-free gems

They’re perfect for:

• Birthday parties

• Meal prep treats

• Special keto celebrations

• Or just a “because-I-deserve-it” dessert!

And let’s be honest—sprinkles make everything better. 🎉

Common Questions

Can I use coconut flour instead of almond flour?

Not recommended. Coconut flour is much more absorbent and will dry these brownies out. Stick with almond flour for best results.

What sweetener is best?

Allulose makes the brownies soft and gooey. Erythritol gives more structure. You can use a blend, or just your favorite 1:1 keto sweetener.

Can I make these dairy-free?

Yes! Swap butter for coconut oil and use coconut cream in the ganache. Use dairy-free sugar-free chocolate chips.

Final Thoughts: Bring Back the Fun (Without the Carbs)

Keto doesn’t have to mean giving up your favorite treats. These Keto Cosmic Brownies are proof that you can indulge, stay low-carb, and have fun with food.

Whether you’re making a batch for your kiddos, sharing at a potluck, or just reliving your childhood with every bite—this recipe brings the magic without the carb hangover.

Don’t Forget to Save & Share!

📌 Pin this recipe for later
💬 Comment below if you made them
📷 Tag @KetoWithMe on social with your cosmic creations!

Want more keto desserts? Check these yummy recipes out:

Keto Chocolate Chip Cheesecake Bars

Keto Pecan Pie

Keto Lemon Bars

Keto Cherry Delight