Brownie Mix Peanut Butter Cookies

Name: Brownie Mix Peanut Butter Cookies
Prep time: 10 min
Cook time: 12 min
Total time: 22 min
Yield: 24 cookies
Ingredients: 1 box brownie mix; 1/2 cup creamy peanut butter; 1/2 cup vegetable oil; 2 large eggs; 1/2 cup chocolate chips (optional); 1/4 cup powdered sugar for dusting (optional)

Highlighted under: Bakery-Style Desserts

I’m excited to share my Brownie Mix Peanut Butter Cookies recipe, which combines two beloved treats into one delicious bite. These cookies are easy to whip up and use a brownie mix for that rich chocolate flavor, paired with creamy peanut butter that makes them irresistibly soft. I love how quickly these come together, making them a perfect choice for when cravings strike or when unexpected guests arrive. Trust me, these cookies will have everyone asking for the recipe!

Created by

Arielle Baxter

Last updated on 2026-02-23T21:29:36.823Z

When I first tried making cookies with a brownie mix, I was stunned by how well it turned out. The mix gave these cookies a fudgy texture that contrasts beautifully with the creamy peanut butter. I experimented a few times with the ratios, and I found that just the right amount of peanut butter enhances the chocolatey goodness without overpowering it.

One of my favorite tips is to chill the dough for about 30 minutes before baking. This small step helps the cookies hold their shape better and results in a delightful chewiness. I guarantee you’ll enjoy every crumb of these delightful cookies!

Why You'll Love These Cookies
Rich chocolate flavor combined with creamy peanut butter
Easy to make with just a few ingredients
Soft texture that's simply irresistible

Tips for Perfect Cookies

To achieve the best texture for your Brownie Mix Peanut Butter Cookies, make sure not to overmix your dough. Once all the ingredients are combined, stop mixing as soon as you no longer see dry brownie mix. This will help maintain a soft and chewy texture in the final product. Additionally, if you decide to add chocolate chips, be cautious to fold them gently into the mixture to prevent breaking them, which can lead to uneven melting during baking.

Baking time is crucial for achieving the perfect cookie consistency. I recommend checking your cookies at the 10-minute mark; the edges should be subtly set while the center still appears soft and slightly underbaked. They will continue to firm up while cooling on the baking sheet. If you prefer a firmer cookie, leave them in the oven for an additional minute or two, but avoid overbaking to prevent dryness.

Ingredient Insights

Using creamy peanut butter is key to achieving that luscious texture and flavor combination in these cookies. If you're looking for a healthier alternative, natural peanut butter can be swapped in, but remember it tends to be more oily, which may slightly alter the consistency. If nut allergies are a concern, sunflower seed butter works wonderfully as a substitute, providing a similar rich flavor without the nuts.

Brownie mix serves as the base for this recipe, simplifying the process drastically. However, not all brownie mixes are created equal. For a richer chocolate flavor, opt for a fudge brownie mix. Also, if you have a favorite homemade brownie recipe, you can adapt it by incorporating peanut butter, but you might need to adjust the liquid ratios to keep the cookies from being too dry.

Ingredients

Gather these simple ingredients to get started:

Ingredients

1 box brownie mix
1/2 cup creamy peanut butter
1/2 cup vegetable oil
2 large eggs
1/2 cup chocolate chips (optional)
1/4 cup powdered sugar for dusting (optional)

Once you have everything ready, let's move on to the baking!

Instructions

Follow these simple steps to achieve cookie perfection:

Preheat and Prepare

Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

Mix Ingredients

In a large bowl, combine the brownie mix, peanut butter, vegetable oil, and eggs. Mix until smooth. If desired, fold in chocolate chips.

Form the Cookies

Scoop tablespoon-sized balls of dough onto the prepared baking sheet, spacing them about 2 inches apart. Optionally, dust with powdered sugar.

Bake

Bake in the preheated oven for 10-12 minutes, until the edges are set but the centers are still soft.

Cool and Enjoy

Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to a wire rack.

Now that your cookies are baked, it's time to enjoy the deliciousness!

Pro Tips

For an extra special treat, drizzle melted chocolate over the cooled cookies for added richness.

Serving Suggestions

These cookies are perfect on their own but pair wonderfully with a glass of milk for a classic experience. You can also serve them warm with a scoop of vanilla ice cream on top for an indulgent dessert. If you're feeling adventurous, try drizzling melted chocolate over the cookies before serving to enhance their chocolatey appeal.

Consider presenting these cookies at gatherings by stacking them on a tiered cake stand or packaging them in a decorative tin for gifts. They hold up well for a few days at room temperature, making them an ideal option for sharing or enjoying throughout the week.

Storage and Freezing

To keep your Brownie Mix Peanut Butter Cookies fresh, store them in an airtight container at room temperature for up to five days. If you want to enjoy them later, these cookies freeze remarkably well. Place them in a single layer in a freezer-safe bag or container, separating layers of cookies with parchment paper to prevent sticking. They can be frozen for up to three months.

When you're ready to enjoy your frozen cookies, simply remove the desired amount and let them thaw at room temperature for about 30 minutes. Alternatively, for a warm treat, you can pop them in the microwave for about 10-15 seconds. Just be cautious not to heat them too long to avoid a rubbery texture.

Questions About Recipes

→ Can I use a different nut butter?

Yes, almond or cashew butter work well as substitutes for peanut butter.

→ How should I store the cookies?

Store them in an airtight container at room temperature for up to a week.

→ Can I freeze the cookie dough?

Yes, you can freeze the dough for up to 2 months. Just thaw in the fridge before baking.

→ What can I add to enhance the flavors?

A pinch of sea salt or a splash of vanilla extract can add wonderful depth to the cookies.