Brownie cookies are the perfect hybrid dessert: the crackly, fudgy center of a brownie with the portable, chewy edges of a cookie. Using a boxed brownie mix keeps the process incredibly simple while delivering rich, chocolatey results every time. This recipe turns one standard mix into a batch of soft, indulgent cookies that are ready in under 30 minutes.
Ingredients
- 1 box (18.3 oz / 519 g) brownie mix (any brand, family-size)
- 1 large egg
- 1/4 cup (60 ml) vegetable oil
- 2 tablespoons (30 ml) water
- 1/2 cup (90 g) semisweet chocolate chips (optional)
Instructions
- Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper or silicone baking mats.
- In a large bowl, combine the brownie mix, egg, oil, and water. Stir with a spatula or wooden spoon until a thick, shiny dough forms. If using chocolate chips, fold them in now.
- Scoop rounded tablespoons of dough (about 1.5 inches / 4 cm in diameter) onto the prepared baking sheets, spacing them 2 inches (5 cm) apart. You should get about 12 cookies per sheet.
- Bake one sheet at a time in the center of the oven for 10–12 minutes. The cookies will look puffed and slightly cracked on top, with edges that are set but still soft to the touch. Do not overbake, as they will continue to set as they cool.
- Remove the baking sheet from the oven and let the cookies cool on the sheet for 5 minutes. Then transfer them to a wire rack to cool completely. Repeat with the remaining dough.
Tips
- Chill the dough if it’s too sticky: If your dough feels overly soft or sticky, refrigerate it for 15–20 minutes before scooping. This helps the cookies hold their shape and prevents spreading.
- Use a cookie scoop: A #40 cookie scoop (about 1.5 tablespoons) makes uniform cookies that bake evenly. If you don’t have one, use two spoons to drop the dough.
- Don’t overbake: The cookies will look underdone when you pull them out, but they set as they cool. Overbaking makes them dry and cakey instead of fudgy.
- Substitute oil: You can replace the vegetable oil with melted butter (cooled slightly) for a richer flavor. Use the same amount, but note the cookies may spread a bit more.
Serving Suggestions
Serve these brownie cookies warm with a glass of cold milk or a scoop of vanilla ice cream for an extra treat. They also make a great base for ice cream sandwiches—just flatten the dough slightly before baking and sandwich a scoop of ice cream between two cooled cookies. For a festive touch, drizzle with melted white chocolate or sprinkle with flaky sea salt before serving.
Variations
- Peppermint Brownie Cookies: Add 1/2 teaspoon peppermint extract to the dough and fold in 1/4 cup crushed candy canes.
- Nutty Delight: Replace the chocolate chips with 1/2 cup chopped walnuts or pecans for added crunch.
- Double Chocolate: Use chocolate brownie mix and add 1/4 cup cocoa powder to the dry mix for an extra-intense chocolate flavor.
- Gluten-Free: Choose a gluten-free brownie mix and follow the same instructions—just check the box for any additional ingredient requirements.
Storage and Reheating
Store baked brownie cookies in an airtight container at room temperature for up to 4 days. To keep them soft, add a slice of bread to the container (it absorbs excess moisture and keeps the cookies chewy). For longer storage, freeze the cookies in a single layer on a baking sheet, then transfer to a zip-top bag and freeze for up to 3 months. To reheat, place a cookie on a microwave-safe plate and heat for 10–15 seconds, or warm in a 300°F (150°C) oven for 5 minutes.
Frequently Asked Questions
Can I use a different size brownie mix?
Yes, but adjust the egg, oil, and water according to the package directions. For a standard 18-ounce (510 g) mix, the ratios above work perfectly. For a larger family-size mix (like 19–20 oz / 540–570 g), add an extra egg and increase the oil to 1/3 cup (80 ml) and water to 3 tablespoons (45 ml).
Why are my cookies spreading too much?
If your cookies spread into flat discs, the dough may be too warm or the baking sheet was too hot. Chill the dough for 15–20 minutes before baking, and always use a cool, lined baking sheet. Also, make sure you’re measuring the oil correctly—too much oil can cause excess spreading.
Can I make the dough ahead of time?
Absolutely! You can prepare the dough and refrigerate it in an airtight container for up to 3 days. Let it sit at room temperature for 10 minutes before scooping and baking. You can also freeze the dough balls for up to 3 months; bake them straight from the freezer, adding 2–3 minutes to the baking time.
How do I know when they’re done?
The edges should be set and the tops should look cracked and slightly shiny. A toothpick inserted into the center should come out with a few moist crumbs, not wet batter. Remember, they will firm up as they cool, so err on the side of underbaking.
Can I make these without eggs?
Yes, you can use a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water, let sit for 5 minutes) or a commercial egg replacer. The cookies will be slightly less dense but still delicious. Follow the package instructions for the egg substitute.
Why did my cookies turn out cakey?
Cakey brownie cookies usually result from overmixing the dough or overbaking. Stir just until the ingredients are combined, and pull the cookies out as soon as the edges are set. Also, avoid using a brownie mix that has “cake-like� instructions—choose a fudgy-style mix for the best texture.
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