Chocolate Brownie Cookie Sandwiches Recipe

If you’re anything like me and have a serious sweet tooth, then you’re going to absolutely fall in love with this Chocolate Brownie Cookie Sandwiches Recipe. These aren’t just any cookies—they’re luscious brownie-textured cookies sandwiched with a dreamy cookie dough buttercream that will have you savoring every bite. I promise once you try this recipe, it’ll become one of your go-to favorites for entertaining or just treating yourself on a quiet afternoon.

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Ingredients & Why They Work

The magic behind these Chocolate Brownie Cookie Sandwiches Recipe comes down to choosing simple, high-quality ingredients that work beautifully together. The bittersweet chocolate and blend of flours create that ideal chewy-fudgy cookie, while the brown sugar in the frosting adds a rich, caramel depth to the buttercream.

• Bittersweet Chocolate Chips: Provides deep chocolate flavor and melts smoothly for that dense brownie texture you crave.
• Unsalted Butter: Using unsalted butter lets you control salt levels and gives the cookies a rich, buttery finish.
• Brown Sugar: Adds moisture and caramel notes, crucial for both the cookies and the buttercream.
• All-Purpose Flour & Bread Flour: The mix boosts chewiness—bread flour’s higher protein content makes the cookies hold up beautifully.
• Dutch Process Cocoa Powder: Gives a rich, smooth chocolate flavor and enhances the color of the cookies.
• Baking Powder & Baking Soda: Both are used together to create that perfect rise and texture balance.
• Vanilla: A simple addition but essential to enhance all the chocolate and buttery flavors.
• Confectioners Sugar & Flour (for buttercream): Flour needs heat-treating to make the safe-to-eat cookie dough buttercream without any worries.
• Heavy Cream: Adds the perfect silky, fluffy texture to the buttercream, making it pipeable yet soft.

Tweak to Your Taste

I love how versatile this Chocolate Brownie Cookie Sandwiches Recipe is—you can easily tweak it to suit your preferences or dietary needs, and it still tastes incredible. Here are some ways I’ve personally personalized this recipe to make it even more my own, and I encourage you to do the same!

• Add a Pinch of Sea Salt: I sprinkle flaky sea salt over the assembled sandwiches sometimes, which creates that perfect sweet-salty hit that keeps everyone coming back for more.
• Swap in Milk or Dark Chocolate: I’ve played around with using different types of chocolate chips or chopped chocolate to adjust sweetness and intensity.
• Make it Vegan: Use vegan butter and an egg replacer in the cookie dough, plus plant-based cream for the buttercream—though the texture might be slightly different, the flavor remains divine.
• Add Mix-ins: Chopped nuts, mini chocolate chips, or even a swirl of peanut butter in the buttercream can elevate these cookies to a whole new level.

Step-by-Step: How I Make Chocolate Brownie Cookie Sandwiches Recipe

Step 1: Heat Treat Your Flour for Safe Cookie Dough Buttercream

This step might seem a little extra, but it’s super important. Spread the flour you’ll use in the buttercream on a baking sheet and bake at 300°F, checking with a thermometer until it reaches 165°F. This makes sure any potential bacteria are eliminated since the buttercream isn’t baked—it keeps the treat safe to enjoy raw while maintaining that full cookie dough taste. I usually bake it for about 6–8 minutes with occasional stirring, then cool completely before moving on.

Step 2: Create Your Decadent Brownie Cookie Base

I melt the bittersweet chocolate and butter together gently over a double boiler, stirring constantly so it’s silky smooth. Once it cools just a bit, I whisk in the eggs and sugars, then fold in the dry ingredients. Remember—don’t overmix here or your cookies could get tough. A quick chill in the fridge makes the dough easier to handle, too.

Step 3: Scoop, Bake, and Shape Your Cookies

I use a small scoop or kitchen scale to portion out even-sized dough balls—this helps the cookies bake evenly and look pretty uniform. Bake at 350°F for about 8–10 minutes, just until the edges set and the centers start to crack slightly. The magic happens just as they come out; while warm, I lightly press the edges inward with a fork or swirl a cookie cutter around to get perfectly round cookie “sandwich slices.” Then leave them to cool on the sheets for about 8–10 minutes before transferring to a wire rack.

Step 4: Whip Up the Cookie Dough Buttercream

This buttercream is where the real indulgence comes in. I beat room-temperature butter and brown sugar until fluffy, then slowly add the sifted powdered sugar mixed with the heat-treated flour. A splash of vanilla, salt, and heavy cream rounds it out, creating a smooth frosting that’s sturdy enough to pipe but melts in your mouth. Be patient when adding the flour–sugar mixture to avoid a powdery mess.

Step 5: Assemble Your Chocolate Brownie Cookie Sandwiches Recipe

Using a piping bag or simply a spoon, I spread or swirl the buttercream generously on the flat side of one cookie, then gently sandwich it with another. Add a sprinkle of flaky sea salt if you like that perfect sweet-salty contrast. Pop them in the fridge to set if you want firmer sandwiches or enjoy them right away at room temperature—they’re fantastic either way!

How to Serve Chocolate Brownie Cookie Sandwiches Recipe

Garnishes

My favorite garnish is a light sprinkle of flaky sea salt on top of the buttercream just before serving. It adds a sophisticated touch and enhances the chocolate flavor beautifully. Sometimes I dust a tiny bit of cocoa powder around the edges or press mini chocolate chips into the buttercream for added texture. It’s these little details that make it feel extra special when sharing with friends.

Side Dishes

Since these are rich treats, I love pairing them with something simple and refreshing—like a tall glass of cold milk, a scoop of vanilla ice cream, or even a lightly brewed cup of coffee or espresso. The bitterness of coffee cuts through the sweetness perfectly. For a party, I sometimes set up a mini dessert bar with fresh berries and whipped cream alongside.

Creative Ways to Present

I had so much fun arranging these Chocolate Brownie Cookie Sandwiches Recipe on large serving platters dusted with cocoa powder for family gatherings. For birthdays, I’ve stacked them in a pyramid shape tied with rustic twine for a charming look. Another favorite is serving them chilled in mini mason jars with a dollop of whipped cream on top—super cute and perfect for a party dessert table.

Make Ahead and Storage

Storing Leftovers

If you have leftovers (which can be rare in my house!), store these cookie sandwiches in an airtight container in a cool, dry place for up to three days. The cookies stay delightfully chewy and the buttercream keeps its creamy texture nicely at room temperature.

Freezing

I’ve frozen these sandwiches several times with great success. First, freeze the cookies individually on a baking sheet until firm, then assemble the sandwiches, wrap them tightly in plastic, and store in a freezer bag. They’ll keep for up to two months, which is perfect for making ahead for special occasions or unexpected guests.

Reheating

Since these sandwiches are best served chilled or at room temperature, I usually let frozen sandwiches thaw in the fridge overnight. If you want to soften the buttercream a bit before serving, just let them sit at room temperature for 15-20 minutes—it revives that creamy texture without melting the cookies.

FAQs

Final Thoughts

This Chocolate Brownie Cookie Sandwiches Recipe holds a special place in my kitchen – it’s that perfect blend of rich chocolate, tender cookie, and luscious buttercream that feels like an indulgent hug. Sharing these with friends and family always brings big smiles and requests for the recipe. Whether you’re baking for a crowd or a cozy night in, this recipe truly delivers on flavor and fun. I can’t wait for you to try it and make it your own—you’ll thank me later!

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