This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases. This comes at no extra cost to you.
One-pan oreo bars is a delightful dessert made with Oreo cookies, chocolate chips, and a rich brownie-like batter topped with sweetened condensed milk, ready in just 45 minutes. This easy recipe yields 12 scrumptious bars and boasts a gooey texture perfect for any sweet tooth. With their decadent flavor and satisfying crunch, they are a surefire hit at gatherings. I remember making these for my friend Lucy’s housewarming party, and they were gone within minutes!
Table of Contents
- Why is One-Pan Oreo Bars so popular?
- What ingredients do you need for One-Pan Oreo Bars?
- How do you make One-Pan Oreo Bars step by step?
- Frequently Asked Questions About One-Pan Oreo Bars
- Simple Ingredient Swaps for Oreo Bars
- How to Store and Reheat Your Oreo Bars
- Common Mistakes to Avoid When Making Oreo Bars
Why is One-Pan Oreo Bars so popular?
Their irresistible combination of chocolate and Oreos makes One-Pan Oreo Bars a standout dessert. They are easy to make in a single dish, saving time and effort.
- Convenience: Made in one pan, these bars reduce cleanup and streamline the baking process.
- Quick and Easy: From mixing to baking, the process takes under an hour, making it perfect for last-minute desserts.
- Versatile flavor: The rich chocolate and crunchy Oreos offer a taste profile that appeals to both kids and adults.
- Perfect for sharing: These bars can be cut into 12 servings, ideal for parties or family gatherings.
What ingredients do you need for One-Pan Oreo Bars?
These bars use simple ingredients you likely have on hand to create a delightful treat. Here’s what you’ll need:
- 1 cup all-purpose flour
- 1/2 cup unsweetened cocoa powder
- 1/2 teaspoon baking powder
- 1/4 teaspoon baking soda
- 1/4 teaspoon salt
- 1/2 cup unsalted butter, melted
- 1 cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 1 cup Oreo cookies, crushed
- 1/2 cup chocolate chips
- 1/2 cup sweetened condensed milk
The melted butter provides moisture while enhancing the chocolate flavors, ensuring these bars are both rich and gooey.
How do you make One-Pan Oreo Bars step by step?
Creating these delicious bars is a straightforward process with rewarding results.
Step 1 — Preheat and Prepare
Preheat your oven to 350°F (175°C) and grease a 9×9-inch baking pan to ensure easy removal of the bars.
Step 2 — Mix Dry Ingredients
In a medium bowl, whisk together the flour, cocoa powder, baking powder, baking soda, and salt until well combined.
You might also enjoy our one pan lemon chicken gnocchi.
Step 3 — Blend Wet Ingredients
In a large bowl, mix the melted butter and sugar until smooth, then add the eggs and vanilla extract, mixing until fully combined.

Step 4 — Combine Ingredients
Gradually add the dry ingredients to the wet mixture, stirring until just combined. Fold in the crushed Oreo cookies and chocolate chips until evenly distributed.
Step 5 — Prepare for Baking
Pour the batter into the prepared baking pan and spread it evenly. Drizzle the sweetened condensed milk over the top of the batter.
Step 6 — Bake
Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out mostly clean. Allow the bars to cool for about 10 minutes before cutting into squares.
For more ideas, check out our one pan breakfast.
Frequently Asked Questions About One-Pan Oreo Bars
How do I know when the bars are done?
Insert a toothpick into the center; if it comes out mostly clean, the bars are ready.
Can I use a different size pan?
A different pan size might alter the baking time and texture. Stick to 9×9 inches for best results.
How should I store leftover bars?
Store them in an airtight container at room temperature for up to three days.
Can I freeze One-Pan Oreo Bars?
Yes, wrap them individually and freeze for up to a month for longer storage.
Looking for something similar? Try our one-pan juicy chicken in balsamic sauce.
Simple Ingredient Swaps for Oreo Bars
If you’re out of certain ingredients, here are a few swaps to consider:
- Butter: Substitute with equal parts coconut oil for a subtle tropical flavor.
- Cocoa Powder: Replace with carob powder for a slightly sweeter taste.
- Oreo Cookies: Use chocolate graham crackers for a different texture.
How to Store and Reheat Your Oreo Bars
To keep them fresh, store the bars in an airtight container in a cool, dry place. For longer storage, wrap each bar individually and place them in the freezer. They last up to a month frozen.
When you’re ready to enjoy them again, defrost the bars at room temperature or microwave them for a few seconds to regain their gooey texture.
Common Mistakes to Avoid When Making Oreo Bars
One typical mistake is overmixing the batter, which can lead to tough bars. Mix until ingredients are just combined.
Another error is overbaking. To prevent dryness, remove the bars when a toothpick comes out mostly clean, not entirely.
One-Pan Oreo Bars
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C) and grease a 9x9-inch baking pan.
- In a medium bowl, whisk together the flour, cocoa powder, baking powder, baking soda, and salt until well combined.
- In a large bowl, mix the melted butter and sugar until smooth.
- Add the eggs and vanilla extract to the butter mixture, mixing until fully combined.
- Gradually add the dry ingredients to the wet mixture, stirring until just combined.
- Fold in the crushed Oreo cookies and chocolate chips until evenly distributed.
- Pour the batter into the prepared baking pan and spread it evenly.
- Drizzle the sweetened condensed milk over the top of the batter.
- Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out mostly clean.
- Allow the bars to cool in the pan for about 10 minutes before cutting into squares and serving.
Notes

Loved this recipe? Save it to your favorite Pinterest board so you can easily find it later! ✨

