These Amazing Frosted Brownie Cookies are the easiest way to enjoy the rich, chewy texture of brownies in a handheld cookie. Made with a box of fudge brownie mix, a little flour, eggs, oil, and semisweet chocolate chips, they bake in just 8 to 10 minutes and make about 24 cookies.
Each cookie has set edges, a soft and slightly underdone center, and plenty of chocolate flavor. Once cooled, the cookies are finished with a creamy homemade chocolate buttercream that makes them taste like a bakery treat while keeping the recipe wonderfully simple.
Jump to RecipeWhy You’ll Love This Recipe
These cookies deliver the best parts of a brownie and a cookie in one dessert. The centers stay dense, moist, and deeply chocolatey, while the edges develop just enough structure to make each cookie easy to hold.
Using a boxed brownie mix keeps the ingredient list short and the preparation quick. The added flour gives the dough enough body to scoop, and the chocolate chips create little pockets of melted chocolate throughout every bite.
- Quick preparation: The dough comes together in about 20 minutes.
- Rich texture: Short baking keeps the centers soft and fudgy.
- Chocolate finish: Homemade cocoa buttercream adds a smooth, creamy topping.
- Party-ready yield: One batch makes about 24 cookies.
They are ideal for cookie trays, birthdays, bake sales, holiday gatherings, or an everyday chocolate craving. The cookies also look polished with very little decorating effort because a simple swirl of frosting makes them instantly inviting.
Ingredients You’ll Need
The cookie base starts with one 18 to 19 ounce box of fudge brownie mix. Choose a mix with a rich chocolate flavor, since it forms the foundation of both the color and taste of the cookies.
A quarter cup of all-purpose flour helps create a scoopable dough without taking away the brownie-like texture. Two large eggs provide structure and richness, while a quarter cup of vegetable oil or another neutral oil keeps the cookies tender.
One cup of semisweet chocolate chips adds extra chocolate texture. You can use regular chips, mini chips, or chopped chocolate, but keep the total amount at one cup for the intended balance.
The buttercream uses softened unsalted butter, unsweetened cocoa powder, confectioners’ sugar, milk, vanilla extract, and a pinch of salt. The salt is small but useful because it balances the sweetness and helps the cocoa taste more pronounced.
How to Make It Step-by-Step
Step 1: Heat the oven to 350°F (175°C), then line one or more baking sheets with parchment paper. The parchment helps prevent sticking and makes it easier to move the delicate warm cookies after baking.
Step 2: Stir the fudge brownie mix and all-purpose flour together in a large mixing bowl. Break up any visible lumps so the flour is evenly dispersed before adding the wet ingredients.
Step 3: Add the two eggs and the vegetable oil to the dry mixture. Stir until the ingredients form a thick, sticky dough, scraping the bottom and sides of the bowl as needed.
Step 4: Fold in the semisweet chocolate chips with a sturdy spatula. Mix just until the chips are spread throughout the dough, since excessive stirring can make portioning more difficult.
Step 5: Scoop approximately 1 1/2 tablespoons of dough for each cookie and place the portions on the parchment-lined baking sheets. Leave about 2 inches between them so the cookies have room to spread without joining together.
Step 6: Bake the cookies for 8 to 10 minutes. Look for edges that appear set and centers that are still soft and slightly underdone, because the cookies continue firming as they cool.
Step 7: Let the cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack. Allow them to cool completely before adding frosting, or the warm surfaces can melt the buttercream.
Step 8: Prepare the frosting by beating the softened butter until smooth. Add the cocoa powder, confectioners’ sugar, milk, vanilla, and salt, then beat until creamy and add a few drops of milk if the frosting needs loosening.
Step 9: Spread the chocolate buttercream over the cooled cookies or pipe it on with a star tip for a decorative finish. Serve immediately, or let the frosting rest until it feels lightly set.
Pro Tips for Perfect Brownie Cookies
The most important rule is to avoid overbaking. Brownie cookies can look unfinished in the center when they are actually ready, and baking them until the middle looks fully set often produces a dry, cakier result.
Ovens vary, so begin checking at the 8-minute mark. The edges should hold their shape, while the middle should look soft rather than wet or liquid.
If the dough seems unusually loose, cover the bowl and chill it for 20 to 30 minutes before scooping. Chilling makes the dough easier to handle, helps the cookies stay thicker, and reduces excessive spreading in the oven.
- Use a cookie scoop for portions that bake at the same rate.
- Keep the dough portions evenly spaced on the baking sheet.
- Use softened butter for smooth frosting rather than melted butter.
- Add milk to the buttercream a few drops at a time so it does not become too thin.
- Wait until the cookies are completely cool before decorating.
For a neat presentation, pipe a small rosette or zigzag of frosting onto each cookie. If you prefer a rustic look, use the back of a spoon to make soft swirls across the surface.
Frosting, Decorating, and Serving
The homemade chocolate buttercream is creamy, cocoa-rich, and sweet enough to contrast with the slightly bittersweet semisweet chocolate chips. Spread it in a generous layer, or pipe a smaller amount if you want the brownie texture to remain the main focus.
Mini chocolate chips, chopped walnuts, or chocolate sprinkles are common additions and can be scattered over the frosting while it is still soft. These extras are optional, so the cookies remain delicious with only the buttercream topping.
Serve the cookies with cold milk, coffee, or vanilla ice cream. For a dessert platter, arrange them in a single layer with the frosting facing upward so the chocolate swirls stay attractive.
Storage and Make-Ahead Tips
Store frosted cookies in an airtight container once the buttercream has set. Place parchment between layers if the cookies must be stacked, and keep them at a cool room temperature for short-term serving.
The unbaked dough can be chilled for 20 to 30 minutes when it needs more structure before scooping. You can also prepare the frosting ahead and keep it covered, then beat it briefly before spreading if it becomes firm.
For the best texture, avoid exposing the cookies to heat or direct sunlight. If the buttercream becomes soft, move the cookies to a cooler place for a short time before serving.
Because these cookies are best when their centers remain fudgy, careful baking matters more than lengthy storage. Make a fresh batch when you want the softest texture and the brightest chocolate flavor.
Amazing Frosted Brownie Cookies
Ingredients
Method
- Heat the oven to 350°F (175°C) and line baking sheets with parchment paper. Stir the brownie mix and flour together in a large bowl.
- Add the eggs and oil to the brownie mixture, then stir until a thick, sticky dough forms. Fold in the semisweet chocolate chips until they are evenly distributed.
- Scoop approximately 1 1/2 tablespoons of dough per cookie onto the prepared baking sheets. Leave about 2 inches between portions to allow for spreading.
- Bake for 8 to 10 minutes, until the edges look set while the centers remain soft and slightly underdone. Cool the cookies on the baking sheet for about 5 minutes, then transfer them to a rack to cool completely.
- Beat the softened butter until smooth, then add the cocoa powder, confectioners' sugar, milk, vanilla, and salt. Beat until creamy, adding a few drops of milk if necessary.
- Spread or pipe the frosting onto the completely cooled cookies. Let the buttercream sit briefly before serving if you prefer a slightly firmer finish.
Notes
Final Thoughts
Amazing Frosted Brownie Cookies are a dependable shortcut to an impressive chocolate dessert. The brownie mix creates a rich, chewy base, while the chocolate chips and cocoa buttercream make every bite especially indulgent.
Keep the baking time short, cool the cookies completely, and adjust the frosting with only a few drops of milk at a time. With those simple details in place, you will have about 24 soft, fudgy cookies ready for sharing in roughly 50 to 60 minutes.
Whether you pipe elegant swirls or spread the frosting with a spoon, these cookies are sure to disappear quickly. Save the recipe for holidays, celebrations, or the next time you want brownies without slicing a pan.