Okay… these might just be my redemption arc for skipping spooky treats last year. 😅 These Brown Butter Fudgy Brownie Mummy Cookies are SO good it’s scary. Imagine a fudgy, crinkly brownie—but in cookie form—with gooey marshmallow bandages and little candy eyes staring back at you. They’re chewy, rich, and slightly messy in the best way possible.
Every bite melts in your mouth with that nutty brown butter flavor, deep chocolate, and a subtle boost from espresso powder that makes the cocoa sing. These are the kind of cookies that make you forget about all your other Halloween desserts because they’re equal parts adorable and delicious. 👀
Ingredients:
Butter: Browning the butter adds a nutty, toffee-like aroma that deepens every flavor in these cookies. It’s the secret to achieving that rich, brownie taste and irresistible chew.
Light Brown Sugar: Keeps the cookies soft and chewy while adding a hint of molasses sweetness that pairs beautifully with the chocolate.
Granulated Sugar: Helps create that shiny, crackly top we all love in brownies and adds a touch of crispness around the edges.
Eggs: Provide structure and richness. Using room-temperature eggs ensures even mixing and a smooth, glossy batter.
Vanilla Extract: Rounds out the flavor and balances the bitterness of the chocolate.
Melted Semi-Sweet Chocolate: This is the soul of the cookie—melted into the batter, it gives you that dense, fudge-like brownie texture in every bite.
All-Purpose Flour: Provides structure without over-thickening the cookies. Too much flour would ruin that soft, gooey center.
Baking Powder: Gives just enough lift so the cookies puff up slightly while staying dense and fudgy.
Salt: Brings balance to the sweetness and enhances the chocolate’s depth.
Cocoa Powder: Boosts that dark chocolate flavor and creates that beautiful, rich color.
Espresso Powder: Totally optional—but it intensifies the chocolate flavor without making the cookies taste like coffee. It’s a secret baker’s trick for next-level brownies (and yes, it’s so worth it).
Chocolate Chips (Folded In): Add pockets of gooey chocolate throughout for extra texture and indulgence.
Marshmallows: Once melted and stretched, they make perfect mummy “bandages.” It’s a fun, sticky, and delicious decoration.
Googly Eyes: The finishing spooky touch that transforms these from brownie cookies to full-on Halloween stars.
Why You’ll Love This Recipe 🎃
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Brownie-level fudgy texture in cookie form 🍫
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Gooey marshmallow “bandages” for Halloween fun
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Optional espresso powder deepens the chocolate flavor (and makes it next-level)
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Beginner-friendly and made in one bowl
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Adorable, party-perfect, and impossible not to love
What Is Brown Butter + How to Make It
Brown butter, or beurre noisette, is butter cooked until the milk solids toast, giving it a nutty, caramel aroma and deep golden color.
How to Make It:
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Melt the butter in a light-colored saucepan over medium-low heat.
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Stir frequently—it’ll foam, sizzle, and pop as the water evaporates.
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After a few minutes, golden brown bits form at the bottom and the butter will smell nutty (like toasted hazelnuts).
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Remove from heat immediately and pour into a bowl to cool for 5–10 minutes before using.
Shortcut: You can skip the browning step and just use melted butter—the cookies will still taste amazing, just slightly less nutty.
Equipment Needed
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Saucepan: For browning your butter to golden perfection.
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Mixing Bowls: Keeps your wet and dry ingredients organized.
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Stand Mixer or Hand Mixer: Whips air into the batter for that shiny, brownie-like top.
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Rubber Spatula: Ideal for folding without overmixing.
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Cookie Scoop: Ensures each cookie bakes evenly.
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Baking Sheet: Gives the cookies consistent heat distribution.
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Parchment Paper: Keeps cookies from sticking and makes cleanup easy.
Substitutions & Modifications
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No espresso powder? Skip it—or add a bit more cocoa powder.
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No brown butter mood? Use regular melted butter instead.
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Dairy-free: Use vegan butter and dairy-free chocolate chips.
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Gluten-free: Swap with a 1:1 gluten-free flour blend.
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Different decorations: Try white chocolate drizzle instead of marshmallows for a less sticky option.
Brown Butter Fudgy Brownie Mummy Cookies (Spooky & Delicious Halloween Treat)
Ingredients
- ½ cup unsalted butter
- ¾ cup light brown sugar
- ¼ cup granulated sugar
- 2 large eggs, room temperature
- 1 tsp vanilla extract
- 8 oz semi-sweet chocolate chips, melted and cooled
- 1 cup all-purpose flour
- 1 tsp baking powder
- ¼ tsp salt
- ¼ cup cocoa powder
- 1 tsp espresso powder optional, but highly recommended
- ½ cup semi-sweet chocolate chips for folding
- 1 cup mini marshmallows
- 32 candy googly eyes for 16 cookies
Instructions
- Brown the butter:In a saucepan over medium-low heat, melt your butter, stirring constantly. It’ll foam and sizzle as the water evaporates. Keep stirring until the milk solids at the bottom turn a golden brown and the butter smells nutty—like toasted hazelnuts. This usually takes 5–7 minutes.Pro tip: Use a light-colored pan so you can see the color change easily. Once browned, immediately pour the butter into a mixing bowl to stop the cooking and let it cool for 5–10 minutes. Shortcut: If you’re not feeling fancy, you can skip browning and use melted butter instead. It’ll still taste amazing—just a little less nutty.
- Cream the sugars:Add the brown sugar and granulated sugar to the cooled butter. Beat with a stand or hand mixer on medium speed for 2–3 minutes until smooth, thick, and glossy.
- Add the eggs and vanilla:Crack in the eggs (make sure they’re room temp!) and pour in your vanilla extract. Beat for another minute until the mixture is light and creamy.
- Add the melted chocolate:Melt 8 oz of semi-sweet chocolate chips in the microwave in 30-second intervals, stirring each time. It should take about 1½ minutes total. Let cool slightly before adding it to the batter. Mix until smooth and glossy—this step gives the cookies their rich, fudgy brownie flavor.
- Combine dry ingredients:In a separate bowl, whisk together flour, baking powder, salt, cocoa powder, and (optional but recommended!) espresso powder.
- Mix it all together:Slowly fold the dry ingredients into the wet batter using a spatula or on the mixer’s lowest speed until just combined. Don’t overmix—it’ll keep your cookies soft and fudgy.
- Add chocolate chips:Stir in the remaining ½ cup of chocolate chips for extra melty pockets of goodness.
- Chill the dough:Cover the bowl and refrigerate the dough for 30 minutes. This step helps prevent spreading and gives the cookies that thick, bakery-style texture.
- Scoop and bake:Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper. Scoop 16 even cookie dough balls using a cookie scoop or tablespoon, roll them smooth, and space them out on the tray. Bake for 10–12 minutes, or until the tops are shiny and slightly crinkled. The centers should still look a little underbaked—trust me, they’ll finish setting as they cool.
- Cool down:Let cookies cool on the baking sheet for 5 minutes, then transfer to a cooling rack. Let them sit for about 30 minutes before decorating.
- Make the mummy bandages:Add your mini marshmallows to a microwave-safe bowl and heat for 30 seconds until puffed and melty. Stir well. Use your thumbs and index fingers to stretch the melted marshmallow into thin, web-like strands. Gently drape them across each cookie to create a “mummy wrap” effect. It’s messy—but that’s part of the fun! Wash your hands with hot water between every few cookies to keep things clean.
- Add the googly eyes:While the marshmallow is still tacky, press two candy eyes onto each cookie. Let the marshmallow set for a few minutes—and you’ve got the cutest (and most delicious) spooky treats ever.
- Enjoy!Serve these fudgy brownie mummy cookies at your Halloween party, or enjoy them with a cozy cup of coffee for a festive fall moment. 🎃
Tips & Tricks for the BEST Cookies:
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Let brown butter cool before adding sugar (too hot will scramble your eggs).
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Espresso powder enhances chocolate flavor without tasting like coffee—don’t skip it if you have it!
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Chill the dough for 30 minutes to prevent spreading and develop flavor.
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Underbake slightly for fudgy centers and that perfect brownie texture.
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Wash your hands with hot water between cookies when adding marshmallows—trust me, lifesaver.
Frequently Asked Questions
Can I use instant coffee instead of espresso powder?
Yes! Use 2 tsp instant coffee granules instead of espresso powder for a similar effect.
Do I have to chill the dough?
It’s not mandatory, but it helps control spreading and makes them extra chewy.
Can I make these ahead?
Definitely. Chill dough up to 48 hours or freeze pre-scooped dough balls for up to 3 months.
Can I use cocoa instead of melted chocolate?
Not for this one—melted chocolate gives that shiny top and fudgy middle that cocoa alone can’t replicate.
Storage Instructions
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Store in an airtight container at room temperature for up to 4 days.
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To keep soft, add a slice of bread to the container.
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If already decorated, store in a single layer with parchment between cookies.
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Freeze undecorated cookies for up to 3 months—decorate after thawing for best results.
More of my recipes
Do you LOVE Halloween?! Check Out More of my SPOOOOOKY Recipes: Spooky Ghost Chocolate Chip Cookies & The Perfect Cookie for Halloween!Toasted Marshmallow Latte (Hot or Iced!) – Tastes Like a Campfire in a Cup
Next-Level Brown Butter Smores Brownies with Homemade Marshmallow Frosting
Conclusion
These Brown Butter Fudgy Brownie Mummy Cookies are the Halloween showstopper you didn’t know you needed. They’re rich, gooey, and perfectly spooky—with just enough mess to make baking them extra fun. Whether you’re making them for a party or just a cozy night in with a scary movie, these will 100% steal the spotlight. 🎃👻
If you make these, tag me @munchiesbymallory so I can see your spooky mummies! 🖤
And if you loved these, check out my Brown Butter Chocolate Chip Banana Bread and Spooky Spider Reese’s Cup Cookies next—they’re equally hauntingly good!
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