If you love Oreos and easy desserts, these Oreo cookie bars will be your new go-to treat. They’re soft in the center, slightly chewy on the edges, and packed with chocolate chips and crunchy cookie pieces. The dough comes together in minutes with pantry staples, and the bars bake up beautifully in one pan.

They’re perfect for parties, bake sales, or a cozy night in. Serve them warm with a scoop of vanilla ice cream, and watch them disappear.

What Makes This Recipe So Good

• Fast and fuss-free: One bowl, one pan, no chilling, and minimal cleanup.
• Perfect texture: Soft and gooey middle with lightly crisp edges and crunchy Oreo bits.
• Balanced sweetness: Brown sugar adds a caramel note that keeps the bars from tasting overly sweet.
• Crowd-pleaser: Familiar flavors everyone loves, from kids to adults.
• Customizable: Easy to swap mix-ins for different flavors and holidays.

Ingredients

• 1/2 cup (113 g) unsalted butter, melted and slightly cooled
• 1 cup (200 g) brown sugar, packed (light or dark)
• 1/4 cup (50 g) granulated sugar
• 1 large egg + 1 egg yolk, room temperature
• 1 1/2 teaspoons vanilla extract
• 1 1/4 cups (160 g) all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/2 teaspoon fine salt
• 12–14 Oreo cookies, coarsely chopped (about 1 1/2 cups)
• 3/4 cup (130 g) chocolate chips (semi-sweet or milk)
• Optional: 1–2 tablespoons milk if dough seems dry; flaky sea salt for topping

Instructions

1. Prep the pan: Heat the oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment, leaving overhang on two sides for easy lifting.Lightly grease the parchment.
2. Melt the butter: Melt butter in the microwave or on the stove. Let it cool for 3–5 minutes so it doesn’t scramble the egg.
3. Whisk the sugars: In a large bowl, whisk melted butter with brown sugar and granulated sugar until smooth and glossy, about 30 seconds.
4. Add egg, yolk, and vanilla: Whisk in the egg, egg yolk, and vanilla until the mixture looks thick and slightly lighter in color.
5. Combine dry ingredients: In a separate bowl, stir together flour, baking powder, baking soda, and salt.
6. Make the dough: Add the dry ingredients to the wet. Fold gently with a spatula until just combined.The dough will be thick. If it looks crumbly, add 1 tablespoon of milk and fold again.
7. Fold in mix-ins: Gently stir in chopped Oreos and chocolate chips, reserving a small handful of each for the top.
8. Press and top: Press the dough evenly into the prepared pan. Scatter the reserved Oreos and chips over the top, pressing them in lightly.Sprinkle with a pinch of flaky sea salt if using.
9. Bake: Bake for 20–25 minutes, or until the edges are set and golden and the center no longer looks wet. A toothpick should come out with a few moist crumbs, not wet batter.
10. Cool and slice: Let the bars cool in the pan for 20–30 minutes. Use the parchment to lift them out, then cut into 12–16 squares.For cleaner slices, cool completely before cutting.

Keeping It Fresh

• Room temperature: Store bars in an airtight container for up to 3 days. Slip in a piece of bread or a marshmallow to keep them soft.
• Refrigerator: Keeps them fresh for up to 5 days. Let them come to room temp or warm briefly in the microwave before serving.
• Freezer: Wrap bars individually and freeze up to 2 months.Thaw at room temperature, or warm for 15–20 seconds in the microwave.

Benefits of This Recipe

• Foolproof method: Melted butter makes the dough easy to mix and boosts chewiness.
• No fancy equipment: A bowl, a whisk, and a spatula are all you need.
• Budget-friendly: Uses basic pantry ingredients and a single pack of cookies.
• Make-ahead friendly: Stays soft for days and freezes well.
• Shareable: Bars are easier to portion and pack than cookies.

Common Mistakes to Avoid

• Overbaking: Pull them when the center is set but still soft. They continue to firm up as they cool.
• Hot butter + eggs: If the butter is too hot, it can partially cook the eggs and affect texture. Let it cool slightly.
• Overmixing: Stir just until the flour disappears.Overworking creates tough bars.
• Crushing Oreos too fine: You want chunks, not sand. Larger pieces add crunch and visual appeal.
• Skipping salt: A little salt sharpens the chocolate and balances sweetness. Don’t omit it.

Variations You Can Try

• Cookies and cream blondies: Swap half the chocolate chips for white chocolate chips.
• Double chocolate: Add 2 tablespoons cocoa powder to the flour and use chocolate chunks.
• Peanut butter twist: Swirl 1/3 cup warmed peanut butter over the batter before baking.
• Mint magic: Use mint Oreos and add 1/4 teaspoon peppermint extract.
• Birthday cake: Add 1/4 cup rainbow sprinkles and use Golden Oreos.
• Gluten-free: Use a 1:1 gluten-free flour blend and gluten-free sandwich cookies.
• S’mores: Fold in mini marshmallows and chopped graham crackers with the Oreos.

FAQ

Can I double the recipe?

Yes.

Bake in a 9×13-inch pan for 24–30 minutes. Watch closely near the end and test with a toothpick.

Do I need to chill the dough?

No. This recipe is designed to bake right away and still deliver a chewy, soft texture.

Can I use salted butter?

You can.

If you do, reduce the added salt to a small pinch or omit it entirely.

How do I know when the bars are done?

Look for golden edges and a center that’s set but still soft. A toothpick should come out with moist crumbs. If it’s clean, they may be a bit dry.

What’s the best way to cut clean squares?

Cool completely, use a long sharp knife, and wipe the blade between cuts.

For ultra-neat edges, chill for 30 minutes before slicing.

Can I make these without eggs?

Yes. Replace the egg and yolk with 1/4 cup plain Greek yogurt or 3 tablespoons aquafaba. Texture will be slightly different but still delicious.

Which Oreos work best?

Regular or Double Stuf both work.

Double Stuf adds extra creaminess and sweetness, while regular gives more crunch.

Can I reduce the sugar?

You can cut the granulated sugar by half. Keep the brown sugar for moisture and chew. The bars will be less sweet but still tasty.

Why did my bars turn cakey?

Likely too much flour or overmixing.

Weigh the flour if possible, or spoon and level it, and fold gently until just combined.

How can I reheat leftovers?

Microwave a square for 10–15 seconds to revive the soft, gooey texture. Add a scoop of ice cream if you want to go all in.

Final Thoughts

These Oreo cookie bars are simple, comforting, and almost guaranteed to please a crowd. They deliver that classic cookies-and-cream flavor in a soft, chewy bar that’s easy to bake and even easier to share.

Keep a batch on hand for last-minute gatherings, or stash some in the freezer for when a craving hits. With a handful of pantry ingredients and a few Oreos, dessert is never far away.