
This indulgent Oreo dump cake turns the nation's beloved cookie into a mouthwatering treat that needs barely any work but gives you tons of chocolate satisfaction. You'll love how the crispy cookie bits contrast with the soft cake, creating exactly what chocolate fans crave.
I whipped this up for my nephew's birthday bash when I was totally short on time. When I saw his reaction after his first taste, I knew this quick dessert needed to stay in my regular rotation forever.
What You'll Need
- Oreo cookies: They make up the crunchy foundation and topping that gives this treat its unique flavor and appearance
- Chocolate cake mix: Cuts down prep time but still packs rich, deep flavor
- Unsalted butter: Brings moisture and helps make the cake wonderfully soft
- Milk: Gets the cake texture just right without making it too heavy
- Chocolate chips: Not required but they add amazing pockets of melted chocolate throughout
How To Make It
- Set Up Your Base:
- Heat your oven to 350°F and coat your baking dish with butter or cooking spray. Take half the Oreos and put them in a ziplock bag. Smash them with a rolling pin until broken into small chunks, but don't turn them into dust. You'll want some texture left. Spread these smashed cookies across the bottom of your dish to build your foundation.
- Mix Your Cake:
- Grab a big bowl and dump in the chocolate cake mix. Add your melted butter while it's still warm but not hot enough to cook anything. Pour in the milk and mix gently with a spatula or wooden spoon. Don't overdo the mixing! Stop as soon as everything's combined with no dry spots. Your batter should be thick but still pourable.
- Add Your Batter:
- Pour the cake mix over your Oreo base. Use your spatula to smooth it out all the way to the edges of the dish. This helps make sure it'll cook evenly through the whole thing.
- Finish The Top:
- Crush your remaining Oreos just like you did the first batch. Some folks like bigger pieces on top to make it look more exciting. Sprinkle these all over the surface of your batter. If you're using chocolate chips, scatter them across the top now.
- Bake It:
- Put your dish on the middle rack in your preheated oven. Let it bake for 30 to 35 minutes or until you can stick a toothpick in the center and pull it out with just a few moist crumbs, not wet batter. The edges should start pulling away from the sides a little bit.

My top way to enjoy this cake is slightly warm with vanilla ice cream on top. Something magical happens when the cold ice cream meets the warm cake and starts to melt into it just a bit. My daughter now asks for this instead of regular frosted cake every birthday.
Keeping It Fresh
This Oreo dump cake stays nice and moist when you store it right. Once it's totally cool, wrap it tight with plastic or put pieces in a sealed container. It'll stay good on your counter for up to 3 days. Want to keep it longer? Pop it in the fridge for up to a week, though the Oreos might get a bit soft. You can even freeze single pieces wrapped in plastic and foil for up to 3 months. Just let them thaw in the fridge overnight before you want to eat them.

Simple Twists
What makes dump cakes so great is how easy they are to change up. Try Golden Oreos with vanilla cake mix for a lighter version that still has that awesome texture mix. Mint Oreos with chocolate cake make an incredible chocolate mint treat that's perfect during the holidays. Want something like a cookies and cream cheesecake? Mix 8 ounces of softened cream cheese with your milk before adding the cake mix. For fancy occasions, try topping the cooled cake with a simple mix of equal parts warmed heavy cream and chocolate chips poured over the top.
Ways To Serve It
This cake tastes great by itself, but you can dress it up for special times really easily. Serve warm pieces with good vanilla ice cream or freshly whipped cream. Make it extra special with warm caramel or hot fudge drizzled on top. At parties, I often cut smaller squares and set them out with fresh berries and coffee. For kids' parties, put a whole Oreo cookie or some colorful sprinkles on each serving right before you hand them out.
Frequently Asked Questions
- → What other Oreo flavors work for this?
You can swap in any Oreo flavor you like, such as mint, birthday cake, or peanut butter for a fun twist.
- → What can I use instead of chocolate cake mix?
Try using brownie mix or even vanilla cake mix instead, though the taste will vary a little.
- → How should I store the leftovers?
Keep any extras in an airtight container in the fridge for up to three days. Warm it up in the microwave briefly before serving.
- → Can this be prepared beforehand?
Totally! Bake it ahead of time and reheat in the oven just before serving to bring back that fresh-baked flavor.
- → Are extra toppings okay?
Sure! Top it with extras like crushed nuts, caramel drizzle, or marshmallows for more flavor and texture.