If you’re looking for an easy dessert recipe that’s equal parts rich, gooey, and ridiculously delicious, these Cake Mix Oreo Bars are about to become your new favorite dessert. Made with a boxed cake mix, a dreamy cream cheese mixture, these indulgent bars are the ultimate chocolate overload treat.
When double-stuffed Oreos came out, I was instantly hooked. There is lots of extra filling, which I love. This recipe has a gooier texture with all the filling. There is lots to enjoy.
Whether you’re baking for a birthday, a family gathering, or just filling some free time with baking therapy, this easy recipe for Oreo cookies in a pan will have your whole family asking for more.
Using Different Baking Pan Sizes for This Dessert Recipe
The goal is to be able to cut your finished bake in half and then sandwich them together with a layer of cream cheese frosting.
- Tip: Line with parchment paper for easy removal.
The cookie base for your Cake Mix Oreo Bars is thick and fudgy, so you can be a little flexibility in how you bake it. Here are some baking pan options and what you can expect with each:
9×13-Inch Baking Dish (Standard and Recommended)
- Result. About 1½-inch thick layers on top and bottom when split and filled.
- Best for. Easy slicing and even baking.
Two Loaf Pans (9×5 inches each)
- Result. Slightly thicker bars, perfect if you want a more compact bake or plan to gift one.
- Best for. Easily splitting the recipe to make two smaller batches.
Quarter Sheet Pan (approx. 9×13)
- Result. Similar to a standard 9×13 dish, but edges may be more pronounced if the sides are lower.
- Best for. Baking in a shallower pan with easy spreading and removing if lined with parchment paper.
8×8 or 9×9-Inch Square Pan (use two pans)
- Result. Extra thick and fudgy bars—about double the height!
- Best for. Deep, bakery-style cake mix cookie bars.
- Bake Time: May need a couple extra minutes. Check at 15 and continue until the center is set.
Round Cake Pans (Two 8- or 9-inch)
- Result. Makes for a fun layered “cake-style” Oreo bar. Slice into wedges for something unique.
- Best for. Presentation or turning bars into a layered cookie cake.
Mini Loaf Pans (6 to 8 loaf pans)
- Result. Perfectly portioned mini servings holding about 1 ½ cups of batter each.
- Best for. Grab-and-go desserts or making dessert boxes.
- Bake Time. 10–12 minutes. Keep an eye out—smaller portions bake quicker.
No matter what pan you use, the most important tips are:
- Don’t overbake—fudgy texture is key!
- Line with parchment paper to lift them out easily.
- Allow the cookie layer to cool completely before adding the cream cheese mixture.
Cake Mix Oreo Bars in Minutes are Indulgent Treats
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Kitchen Essentials
Ingredients
- 15.25 Ounces Devil’s Food Cake Mix 1 box of your favorite chocolate cake mix
- 2 Large Eggs room temperature
- 1/3 Cup Lard melted, or melted butter, or oil
Cream Cheese Filling
- 6 Tablespoons Unsalted Butter softened
- 8 Ounces Cream Cheese softened
- 1 Teaspoon Vanilla Extract
- 2 Cups Powdered Sugar
Instructions
- Preheat your oven to 350°F and line a baking dish or cake pan with parchment paper. This is the best way to ensure easy removal and cleanup.
- In a large mixing bowl, place cake mix, eggs, and lard. Use a spoon or your hands to combine into a thick cake mixture. It’ll resemble cookie dough more than a traditional batter.15.25 Ounces Devil’s Food Cake Mix, 2 Large Eggs, 1/3 Cup Lard
- Press the dough evenly into the bottom of the pan. You can use a 9×13 baking dish, two loaf pans, or half of a sheet pan. The cake mix cookie bars won’t spread, so shape accordingly. I used
- Bake in the center of the oven for 10–15 minutes. You’re aiming for gooey cake bars, so don’t overbake!
- Let cool completely in the prepared pan on wire racks or a cooling rack.
Make the Cream Cheese Mixture
- In a large bowl, use an electric mixer on medium speed to beat together the butter and cream cheese until smooth and fluffy.6 Tablespoons Unsalted Butter, 8 Ounces Cream Cheese
- Add vanilla extract and 2 cups of powdered sugar, mixing well. Continue adding sugar until you reach your preferred level of sweetness.1 Teaspoon Vanilla Extract, 2 Cups Powdered Sugar
Assemble the Bars
- If you baked your bars in one single layer, cut them in half.
- Spread the cream cheese mixture over one half, then sandwich with the other half on top—just like a giant homemade Oreo.
- Chill in the fridge for at least 20–25 minutes to let everything set.
Your Own Private Notes
Notes
Serve and Store
Cut your Cake Mix Oreo Bars into small squares—they’re rich and satisfying, especially when served cold with a cold glass of milk or a scoop of ice cream. Store any leftovers in an airtight container in the fridge for up to 5 days.Nutrition
Cake Mix Oreo Bars Variations to Try
- Want to take things even further? Optional mix-ins. Try mixing in white chocolate chips, mini chocolate chips, or even crushed Oreo cookie pieces for extra texture!
- Use Funfetti cake mix and Golden Oreos for a colorful spin—perfect for birthday cakes or celebrations.
- Make red velvet Oreo bars with red velvet cake mix and crushed tuxedo bars.
- Swap out the cream cheese filling for Cool Whip mixed with brown sugar for a lighter twist.
- Sprinkle the top of the crushed Oreos with extra cocoa powder or drizzle with melted butter and chocolate sauce for a more decadent bite.
These Cake Mix Oreo Bars are everything we love about cake mix cookies and delicious cookies combined into one perfect dessert bar.
Delicious Dessert
With a chewy, chocolatey layer of chocolate and a tangy cream center, they’re bound to be one of your favorite cookies in bar form.
Whether you’re posting your creation to social media or just sneaking one from the fridge during late-night cravings, these bars are a great way to enjoy everything good about sandwich cookies and homemade Oreos—all with minimal effort.
My family loved this!