Craving something sweet, chewy, and irresistibly peanut buttery? Look no further than these gluten-free peanut butter cookie bars! This recipe is perfect for anyone who loves the classic combination of peanut butter and chocolate but needs to avoid gluten. Whether you're baking for a family gathering, a potluck, or just a treat-yourself moment, these bars are guaranteed to satisfy.
In this post, you'll discover why these gluten-free peanut butter cookie bars are a must-try, how to make them step-by-step, and some pro tips to ensure your bars turn out perfectly every time.

Why You'll Love This Recipe
- Easy to Make: With simple ingredients and straightforward steps, this recipe is perfect for both novice and experienced bakers.
- Rich Peanut Butter Flavor: The star of the show, peanut butter, shines in every bite, making these bars a peanut lover's dream.
- Naturally Gluten-Free: Made with gluten-free flour, these bars are perfect for those who need to avoid gluten but don't want to compromise on flavor.
- Versatile: These bars are perfect for any occasion, from casual snacking to special celebrations.
This gluten-free peanut butter cookie bars recipe is sure to become a staple in your dessert rotation. With its simple ingredients and delicious flavor, it's the perfect treat for any occasion. Check out more of my recipes, like Chocolate Raspberry Yogurt Clusters, 3-Ingredient Creamy Pistachio Nice Cream, and Easy Gluten-Free Crème Brûlée to satisfy all your gluten-free cravings!

Tips for Perfect Gluten-Free Peanut Butter Cookie Bars
- Choosing the Right Flour: Not all gluten-free flours are created equal. For this recipe, I recommend using a high-quality gluten-free all-purpose flour that includes a blend of rice flour, tapioca starch, and potato starch. This will give your bars the perfect texture-soft and chewy, without being crumbly. My pick is King Arthur's Measure-for-Measure gluten free flour.
- Baking Time: Keep a close eye on the bars as they bake. Overbaking can lead to dry bars, so aim for a bake time of around 25 minutes or until the edges are golden brown.
- Storing Your Bars: Store the cooled cookie bars in an airtight container at room temperature for up to five days. You can also freeze them for up to three months-just thaw at room temperature before serving.
Key Ingredients
- Peanut Butter: The primary flavor component, peanut butter adds richness and a creamy texture to the bars.
- Gluten-Free Flour: Provides structure and a soft crumb. Use a high-quality blend for the best results.
- Brown Sugar: Adds moisture and a deep, molasses-like flavor that complements the peanut butter.
- Eggs: Help bind the ingredients together and contribute to the soft, chewy texture.
- Semi-Sweet Chocolate Chips: A classic pairing with peanut butter, chocolate chips add bursts of rich chocolate flavor throughout the bars.

Step-by-Step Guide
- Preheat Your Oven: Preheat your oven to 350°F (175°C). This ensures that your bars bake evenly.
- Prepare the Baking Dish: Grease a 9x9-inch baking dish or line it with parchment paper to make it easier to remove the bars after baking.
- Cream the Butter and Sugars: In a large mixing bowl, beat together 1 cup of unsalted butter, ½ cup of granulated sugar, and ½ cup of brown sugar until light and fluffy.
- Add the Wet Ingredients: Mix in 1 teaspoon of vanilla extract and 2 eggs, adding the eggs one at a time and beating well after each addition. Then, add the creamy peanut butter and mix until fully incorporated.
- Combine Dry Ingredients: In a separate bowl, whisk together 2 cups of gluten-free all-purpose flour, ½ teaspoon of baking soda, and ½ teaspoon of salt. Gradually add the dry ingredients to the wet mixture, mixing until just combined.
- Stir in the Chocolate Chips: Fold in ½ cup of semi-sweet chocolate chips, ensuring they are evenly distributed throughout the dough.
- Spread the Dough: Spread the dough evenly into the prepared baking dish, using a spatula to smooth the top.
- Bake: Bake in the preheated oven for 25 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out clean.
- Cool and Cut: Allow the cookie bars to cool completely in the baking dish before cutting them into squares.
FAQ Section
Yes! Substitute the butter with a dairy-free alternative like coconut oil or a vegan butter to make these bars dairy-free.
Store in an airtight container at room temperature for up to five days, or freeze for up to three months.
Absolutely! Try adding chopped nuts, dried fruit, or even a drizzle of melted chocolate on top for extra flavor and texture.

Gluten-Free Peanut Butter Cookie Bars
Equipment
- 9x9-inch baking dish
- Parchment paper (optional, for lining the baking dish)
- Large mixing bowl
- Hand mixer or stand mixer
- Cooling rack
- Toothpick (for testing doneness)
Ingredients
- 1 cup unsalted butter softened
- ½ cup granulated sugar
- ½ cup brown sugar
- 1 teaspoon vanilla extract
- ½ teaspoon salt
- ½ teaspoon baking soda
- 2 large eggs
- 2 cups gluten-free all-purpose flour
- ½ cup creamy peanut butter
- ½ cup semi-sweet chocolate chips
Instructions
- Preheat the Oven: Preheat your oven to 350°F (175°C) to ensure even baking.
- Prepare the Baking Dish: Grease a 9x9-inch baking dish or line it with parchment paper for easy removal of the cookie bars.
- Cream the Butter and Sugars: In a large mixing bowl, combine 1 cup unsalted butter, ½ cup granulated sugar, and ½ cup brown sugar. Beat together until light and fluffy.
- Add Wet Ingredients: Mix in 1 teaspoon vanilla extract and 2 eggs, adding the eggs one at a time and beating well after each addition. Add ½ cup creamy peanut butter and mix until fully incorporated.
- Combine Dry Ingredients: In a separate bowl, whisk together 2 cups gluten-free all-purpose flour, ½ teaspoon baking soda, and ½ teaspoon salt. Gradually add the dry ingredients to the wet mixture, mixing until just combined.
- Stir in Chocolate Chips: Fold in ½ cup semi-sweet chocolate chips until evenly distributed throughout the dough.
- Spread the Dough: Spread the dough evenly into the prepared baking dish, using a spatula to smooth the top.
- Bake: Bake in the preheated oven for 25 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out clean.
- Cool and Cut: Allow the cookie bars to cool completely in the baking dish before cutting them into squares.




