Make Reese’s Peanut Butter Earthquake Cake with rich chocolate cake, creamy peanut butter cheesecake filling, chocolate chips, and peanut butter cups. An irresistible dessert for chocolate and peanut butter lovers!
If you love the combination of chocolate and peanut butter, this Reese’s Peanut Butter Earthquake Cake is a dessert you need to try. It features a moist chocolate cake base, a rich cream cheese and peanut butter filling, and chunks of Reese’s Peanut Butter Cups scattered throughout.
As the cake bakes, the creamy filling sinks into the chocolate cake, creating delicious pockets of peanut butter goodness. The result is a wonderfully messy dessert with a soft, fudgy texture and plenty of chocolate in every bite.
The best part? You can prepare it with a boxed cake mix and a handful of simple ingredients, making it perfect for family gatherings, potlucks, birthdays, or weekend baking.
Ingredients
For the Chocolate Cake
- 1 box chocolate fudge cake mix (approximately 15–16 ounces)
- Ingredients required on the cake mix package, usually eggs, oil, and water
- 1 cup semi-sweet chocolate chips
- 8–10 Reese’s Peanut Butter Cups, chopped
For the Peanut Butter Cheesecake Filling
- 8 ounces cream cheese, softened
- ½ cup creamy peanut butter
- ½ cup unsalted butter, softened
- 2 cups powdered sugar
- 1 teaspoon vanilla extract
Optional Toppings
- ¼ cup extra chopped Reese’s Peanut Butter Cups
- 2 tablespoons peanut butter, gently warmed for drizzling
- 2 tablespoons chocolate chips
Instructions
Step 1: Preheat the Oven
Preheat your oven to 175°C (350°F).
Grease a 9 × 13-inch baking dish with butter or nonstick cooking spray. Make sure the corners and sides are coated to help prevent sticking.
Step 2: Prepare the Chocolate Cake Batter
Prepare the chocolate cake mix according to the instructions on the package.
Mix until the batter is smooth, but avoid overmixing. Pour the batter evenly into the prepared baking dish.
Sprinkle the chocolate chips and about half of the chopped Reese’s Peanut Butter Cups over the batter.
Step 3: Make the Peanut Butter Filling
In a large bowl, beat the softened cream cheese and butter until smooth and creamy.
Add the peanut butter and vanilla extract, then beat again until combined.
Gradually add the powdered sugar, mixing until the filling becomes thick, fluffy, and spreadable.
Step 4: Add the Filling
Drop spoonfuls of the peanut butter cheesecake mixture over the chocolate cake batter.
You do not need to spread the filling evenly or swirl it completely into the batter. Leaving separate pockets of filling helps create the cake’s signature earthquake appearance.
Sprinkle the remaining chopped Reese’s Peanut Butter Cups over the top.
Step 5: Bake the Cake
Place the baking dish in the preheated oven and bake for approximately 35–45 minutes.
The edges should look set, while the center may remain soft because of the creamy filling. Check the cake near the end of the baking time, as ovens and cake mixes vary.
Avoid expecting a completely clean toothpick from every part of the cake because the peanut butter filling and melted chocolate will remain moist.
Step 6: Cool Before Serving
Remove the cake from the oven and let it cool for at least 30–45 minutes before cutting.
For cleaner slices, refrigerate the cake after it has cooled. For a softer, gooier dessert, serve it slightly warm, using a spoon to scoop out portions.
Step 7: Add the Finishing Touches
Drizzle warmed peanut butter over the cake and sprinkle on extra chocolate chips or chopped Reese’s Peanut Butter Cups.
Serve on its own or with a scoop of vanilla ice cream for an extra-indulgent dessert.
Tips for the Best Reese’s Peanut Butter Earthquake Cake
- Use softened cream cheese: This helps create a smooth filling without lumps.
- Choose creamy peanut butter: It blends more easily into the cheesecake mixture than chunky peanut butter.
- Don’t overmix the filling: Mix just until smooth and fluffy.
- Keep the filling in spoonfuls: The uneven distribution creates the characteristic earthquake effect.
- Watch the baking time: The filling makes the center softer than a traditional chocolate cake.
- Allow time to cool: Cooling helps the cake hold together better when served.
Delicious Variations
Double Chocolate Peanut Butter Cake
Use dark chocolate chips and chocolate fudge cake mix for an even richer chocolate flavor.
Extra Reese’s Version
Add more chopped peanut butter cups to the filling and sprinkle additional pieces over the top before baking.
Peanut Butter Cup Sundae Cake
Serve warm portions with vanilla ice cream, chocolate sauce, and a drizzle of peanut butter.
Homemade Cake Version
If you prefer not to use a boxed mix, prepare your favorite chocolate cake batter from scratch and use the same peanut butter cheesecake filling. Baking time may vary depending on the batter and dish.
How to Store Reese’s Peanut Butter Earthquake Cake
Because this cake contains cream cheese, it should not be left at room temperature for extended periods.
- Refrigerator: Cover and refrigerate for up to 4 days.
- Freezer: Freeze individual portions in airtight, freezer-safe containers for up to 2–3 months for best quality.
- Reheating: Warm an individual portion briefly in the microwave if you prefer a gooey texture. Avoid overheating, as the filling can become very hot.
Refrigerate leftovers within 2 hours of serving.
Frequently Asked Questions
Why is it called an earthquake cake?
The name comes from the uneven appearance that develops as the creamy filling sinks into the cake batter during baking, creating cracks, pockets, and irregular layers.
Can I make this cake ahead of time?
Yes. Bake it a day ahead, let it cool, cover it, and refrigerate it. Add any final drizzle or toppings just before serving.
Can I use natural peanut butter?
Conventional creamy peanut butter usually produces the most consistent filling. Natural peanut butter can work, but stir it thoroughly first because separated oil may change the filling’s texture.
Can I use a different cake mix?
Yes. Devil’s food or another chocolate cake mix works well. Follow the package directions for preparing the batter.
Does this cake need refrigeration?
Yes. Since the filling contains cream cheese, refrigerate the cake after cooling and return leftovers to the refrigerator promptly.
Final Thoughts
Reese’s Peanut Butter Earthquake Cake combines everything dessert lovers enjoy: moist chocolate cake, creamy peanut butter filling, melted chocolate chips, and chunks of peanut butter cups.
It’s easy enough for a weekend baking project but indulgent enough to serve at a celebration. Prepare it for your next family gathering, add a scoop of ice cream, and enjoy a rich dessert that brings chocolate and peanut butter together in every bite!