Directions to follow
- Preheat your oven to 350°F (175°C) and line an 8×8-inch baking dish with parchment paper.
- In a mixing bowl, beat the peanut butter, unsalted butter, brown sugar, and granulated sugar together until the mixture is creamy and smooth.
- Add the eggs and vanilla extract into the bowl, mixing until everything is well combined.
- In a separate bowl, whisk together the flour, baking powder, and salt.
- Gradually add the dry mixture to the wet ingredients, stirring until just combined.
- Spread the dough evenly into your prepared baking dish.
- Bake for 25-30 minutes, or until the edges are golden and a toothpick inserted into the center comes out clean.
- Allow the bars to cool completely.
- For optional frosting, whisk together the peanut butter, powdered sugar, milk, and vanilla until smooth. Spread this frosting over the cooled bars.
- Slice into squares, serve, and enjoy!
Best ways to enjoy it
These peanut butter cookie bars are delightful on their own but can be elevated with a few simple serving suggestions. Consider serving them warmed with a scoop of vanilla ice cream on the side for an indulgent dessert. For an extra layer of flavor, top the bars with some crushed peanuts or a drizzle of chocolate sauce. Pair them with a glass of cold milk or a rich cup of coffee for a sweet afternoon pick-me-up.
How to store & freeze
To keep your peanut butter cookie bars fresh, store them in an airtight container at room temperature for up to a week. If you want to extend their shelf life, you can freeze them. Wrap individual bars in plastic wrap and place them in a resealable freezer bag, where they will stay good for about three months. When you’re ready to enjoy them, thaw them at room temperature or pop them in the microwave for a few seconds to bring back their melty goodness.
Helpful cooking tips
For the best results with your peanut butter cookie bars, here are a few tips to keep in mind:
- Use room temperature, softened butter to achieve a smooth and creamy texture—don’t rush this step.
- For a more intense peanut butter flavor, opt for a natural peanut butter that contains only peanuts and salt.
- If you prefer a less sweet treat, reduce the sugar slightly; just make sure not to alter it too much, as sugar also contributes to the structure.
- Always allow your bars to cool completely before slicing for cleaner cuts.
Creative twists
If you’re feeling adventurous, consider adding a twist to your peanut butter cookie bars:
- Incorporate chocolate chips or chunks for a chocolate-peanut butter combo.
- Swap half of the all-purpose flour for whole wheat flour for a nuttier flavor and added nutrition.
- Experiment with different nut butters, like almond or cashew, to create a whole new flavor experience.
- Try adding in a sprinkle of sea salt on top for a sweet-salty contrast.
FAQs
What is the prep time for peanut butter cookie bars?
You can expect a prep time of around 15 minutes, with an additional 25-30 minutes for baking.
Can I use natural peanut butter in this recipe?
Absolutely! Just ensure that it’s well-stirred and not overly runny.
How can I make these bars gluten-free?
To make gluten-free peanut butter cookie bars, swap the all-purpose flour for a gluten-free all-purpose flour blend.
How can I avoid the bars sticking to the pan?
Using parchment paper as a lining helps prevent sticking and makes for easy removal. Just be sure to let the bars cool in the pan for a bit before lifting them out.
These peanut butter cookie bars are sure to impress, and with these tips and variations, you can make them your own!






