Name: Reese’s Peanut Butter Earthquake Cake
Prep time: 15 min
Cook time: 45 min
Total time: 60 min
Ingredients: 1 box chocolate cake mix (plus ingredients listed on the box (typically eggs, oil, and water)); 1/2 cup butter (melted); 8 oz cream cheese (softened); 1/2 cup peanut butter; 1/2 teaspoon vanilla extract; 4 cups powdered sugar; 1/2 cup semi-sweet chocolate chips

Jump to Recipe

Craving a dessert that combines everything you love about peanut butter cups and gooey, chocolatey cakes? Reese’s Peanut Butter Earthquake Cake is the answer! This easy and irresistible cake brings together rich chocolate, creamy peanut butter, and pockets of melty cream cheese for a treat that’s equal parts decadent and playful. I remember the first time I made this cake for a family celebration—it was gone before I could grab a second slice! The earth-shattering combination of flavors makes it unforgettable, while the quick prep means you can whip it up any night of the week. If you’ve enjoyed my popular Peanut Butter Cup Brownies, you’ll adore the extra-rich, gooey texture of this cake. Dive in—your sweet tooth will thank you!

What is Reese’s Peanut Butter Earthquake Cake?

Have you ever wondered what happens when you shake together peanut butter, chocolate, and a cake mix? You get a Reese’s Peanut Butter Earthquake Cake, of course! The name is a playful nod to the way the cake “cracks” and “erupts” with delicious fillings as it bakes—like a tasty tremor right in your kitchen. Maybe it should be called a “sweet-tooth shockwave!” There’s truth to the old saying, “the way to a man’s heart is through his stomach,” and this cake is living proof. So are you ready to try this epic and uproariously fun dessert? Grab your spatula and let’s get baking!

Why You’ll Love This

This show-stopping cake is an instant hit for three simple reasons: flavor, fun, and savings. First, there’s the main highlight—the rich, gooey center created by swirls of creamy peanut butter and tangy cream cheese nestled in decadent chocolate cake. Making this at home is cost-effective; you skip expensive bakery prices without sacrificing any indulgence. Finally, the layered toppings—melty chocolate chips and the salty-sweet combo of Reese’s flavors—give each bite a delightful surprise. If you’ve loved my Buckeye Brownies, this is your next baking obsession! Don’t just take my word for it—give this recipe a try tonight and treat your family to a sweet homemade adventure.

How to Make

Quick Overview

This Reese’s Peanut Butter Earthquake Cake is perfect for busy bakers and chocolate lovers alike. The simple method uses a boxed cake mix and a handful of pantry staples to create a dessert that feels bakery-worthy. Each slice serves up a molten layer of peanut butter and cream cheese through a moist chocolate base—no fancy equipment needed! Total prep time is about 15 minutes, with a baking time under an hour, so you can easily whip up this cake for last-minute guests or weeknight cravings.

Ingredients

1 box chocolate cake mix (plus ingredients listed on the box, typically eggs, oil, and water)
1/2 cup butter, melted
8 oz cream cheese, softened
1/2 cup peanut butter
1/2 teaspoon vanilla extract
4 cups powdered sugar
1/2 cup semi-sweet chocolate chips

Step-by-Step

Prepare the Cake Mix: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan. Prepare the chocolate cake mix according to the package directions (usually combining with water, oil, and eggs). Pour the batter evenly into the prepared pan.
Make the Cream Cheese Layer: In a large bowl, beat the softened cream cheese with a hand mixer until smooth. Add the melted butter, peanut butter, and vanilla extract, and mix until combined.
Add the Sugar: Gradually blend in powdered sugar, mixing well until the filling is creamy and thick.
Layer the Cake: Dollop the peanut butter mixture over the cake batter in the baking pan. Use a knife to gently swirl the cream cheese mixture into the cake batter, creating streaks and pockets.
Top with Chips: Sprinkle the semi-sweet chocolate chips evenly over the top of the cake.
Bake: Place the pan in the oven and bake for 40–45 minutes. The cake should be set around the edges but slightly gooey in the center—that’s where the “earthquake” magic happens!
Cool and Serve: Allow the cake to cool for at least 15 minutes before serving. Enjoy warm for ultimate gooeyness, or let it cool completely for easier slicing.

What to Serve Reese’s Peanut Butter Earthquake Cake With

Pair your slab of earthquake cake with a cold glass of milk or a hot cup of coffee for the ultimate dessert experience. For a show-stopping party platter, serve small squares alongside fresh strawberries or a scoop of vanilla ice cream. If you’re feeling indulgent, drizzle a little warm chocolate or caramel sauce over the top. This cake also makes an incredible addition to any potluck or birthday celebration—just watch it disappear!

Top Tips for Perfecting

Ingredient Swaps: Don’t have cream cheese? Substitute with Neufchatel or use a thick Greek yogurt for a tangy twist.
Timing is Key: For gooey, lava-like pockets, slightly underbake the cake and serve warm. Prefer tidy slices? Bake a few extra minutes and cool completely before cutting.
Mix-Ins: Add chopped peanut butter cups or roasted peanuts for extra crunch and bursts of flavor.
Avoid Overmixing: When swirling the peanut butter layer, use a light hand—big streaks make the best gooey bites.
Go Gluten-Free: Substitute with your favorite gluten-free chocolate cake mix without compromising texture.
Bake Ahead: You can mix, assemble, and refrigerate the unbaked cake a few hours ahead for easy entertaining.

Storing and Reheating Tips

Storing: Cover any leftovers tightly with plastic wrap or store in an airtight container. The cake will stay fresh at room temperature for up to 2 days, or refrigerate for up to 5 days for maximum freshness.
Freezing: To freeze, cut cooled cake into individual squares and wrap each in plastic. Store in a freezer-safe bag for up to 2 months. Thaw slices at room temperature before enjoying.
Reheating: For that just-baked gooey texture, reheat individual portions in the microwave for 10–15 seconds. If reheating the whole cake, cover with foil and warm in a 300°F oven for about 10 minutes.

FAQs

Can I use chunky peanut butter instead of creamy?

Absolutely! Chunky peanut butter will add an extra layer of texture and crunch, giving your cake even more personality.

Can I swap the chocolate cake mix for another flavor?

Yes, feel free to experiment—yellow cake, devil’s food, or even a peanut butter cake mix can create fun, tasty variations.

Do I need to refrigerate this cake?

It’s best stored covered at room temperature for 1–2 days, but for long-term freshness or in warm weather, keep it chilled in the fridge.

Can I add Reese’s cups or other candies?

Definitely! Chopped Reese’s cups, peanut butter chips, or mini marshmallows make fantastic add-ins for extra fun and flavor.

How do I know when the cake is done?

Look for set edges and a slightly jiggly center. The toothpick test should show moist crumbs (but not wet batter), and the top should be golden and crackly.

Conclusion

Reese’s Peanut Butter Earthquake Cake is a must-make for anyone who loves the combination of chocolate, peanut butter, and gooey cream cheese. With its ease of preparation, cost-saving ingredients, and over-the-top flavor, it’s guaranteed to become a family favorite. This playful, bakery-worthy dessert can be made with everyday ingredients and delivers dramatic results—perfect for weekday treats or special celebrations. Don’t forget to explore more decadent recipes on the blog, and let me know in the comments how your earthquake cake turns out. Happy baking!