The perfect pairing of creamy peanut butter and crunchy Oreos comes together in these soft, melt-in-your-mouth Oreo Peanut Butter Cookie Bars. Easy to prepare and ideal for bake sales, parties, or an indulgent weeknight treat, these bars satisfy both chocolate and peanut butter cravings. Whether you favor rich peanut butter, classic Oreos, or simply enjoy baking, this recipe delivers a reliably comforting dessert that’s sure to become a household favorite.
Recipe Notes for Perfect Oreo Peanut Butter Cookie Bars
- Creamy peanut butter: Use a smooth, creamy peanut butter to achieve the tender, melt-in-your-mouth texture. Chunky styles will change the consistency and bite.
- Bake time: These bars are baked for about 25 minutes to stay soft in the center. If you prefer a firmer, more well-done bar, increase the baking time by a few minutes and watch closely.
- Pan type: A metal 9×13-inch pan conducts heat more efficiently than glass and helps produce chewy centers with crisp edges. If you use a glass pan, add a few extra minutes to the bake time.
Key Steps
- Room-temperature butter: Soften the butter before creaming to make it blend smoothly with peanut butter and sugars.
- Creaming: Beat the butter, peanut butter, and sugars until light and fluffy. This step incorporates air for a softer texture.
- Gentle mixing: Add the flour and salt on low speed and mix just until combined to avoid developing too much gluten, which can make bars tough.
- Pressing the Oreos: Place the Oreos on top of the batter and press gently so they adhere while baking and remain intact when sliced.
- Cooling: Allow the bars to cool completely in the pan before cutting to ensure tidy slices and a set center.
Ingredient Details
These Oreo Peanut Butter Cookie Bars come together with simple, pantry-friendly ingredients. Below is an explanation of each component and how it contributes to the final texture and flavor.
- Salted butter (1 cup, room temperature): Butter brings richness and helps create tender crumbs. Salted butter adds a balanced savory note that enhances sweetness.
- Creamy peanut butter (1 cup): The peanut butter provides the dominant flavor and creamy texture. Choose a stable, smooth brand for consistent results.
- Granulated sugar (1 cup): White sugar adds sweetness and contributes to the bars’ structure and light browning.
- Dark brown sugar (1 cup, firmly packed): Brown sugar adds moisture, chewiness, and a subtle molasses depth that complements peanut butter.
- Eggs (2 large): Eggs bind the ingredients and help the bars set while remaining tender.
- Pure vanilla extract (2 teaspoons): Vanilla rounds out the flavors and enhances the overall aroma.
- All-purpose flour (2 cups): Flour provides structure and gives the bars a chewy, cookie-like base.
- Salt (1 teaspoon diamond kosher; ½ teaspoon Morton): A pinch of salt amplifies flavor and balances the sweetness; adjust for your salt type.
- Oreos (~16): Whole or halved Oreos are pressed into the top of the batter for crisp texture and classic cookie flavor in every bite.
These ingredients work together to produce an indulgent dessert that blends the nutty creaminess of peanut butter with the crunchy, chocolatey contrast of Oreos.
Oreo Peanut Butter Cookie Bars — Recipe
Prep Time: 20 minutes • Cook Time: 25 minutes • Cooling: 1 hour • Total Time: 1 hour 45 minutes • Servings: 12
Ingredients
- 1 cup salted butter, room temperature
- 1 cup creamy peanut butter
- 1 cup granulated sugar
- 1 cup dark brown sugar, firmly packed
- 2 large eggs
- 2 teaspoons pure vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon diamond kosher salt (or ½ teaspoon Morton)
- ~16 Oreos, whole or halved
Instructions
- Preheat the oven to 350°F (175°C). Prepare a 9×13-inch baking pan by spraying it with cooking spray or lining it with parchment paper.
- In a stand mixer or using a hand mixer on medium speed, cream the room-temperature butter, creamy peanut butter, granulated sugar, and dark brown sugar for about 2 minutes, until the mixture is light and fluffy.
- Add the eggs and vanilla extract, then mix on medium for about 1 minute to incorporate.
- On low speed, add the all-purpose flour and salt and mix until just combined, about 20 seconds. Avoid overmixing so the bars remain tender.
- Pour the batter into the prepared pan and smooth it with a spatula to form an even layer.
- Break some Oreos in half while leaving others whole for variety. Arrange the Oreos on top of the batter and press them in slightly so they adhere during baking.
- Bake in the preheated oven for 25–30 minutes, until the center is set but still soft. This bake time is for a 9×13-inch metal pan; increase time if using a glass pan or a smaller pan.
- Remove from the oven and let the bars cool in the pan for about 1 hour before cutting into squares to ensure clean slices and a well-set center.
