There’s just something about a warm, gooey cake that brings back memories of cozy family gatherings and sweet celebrations. This Indulgent Reese’s Chocolate Peanut Butter Cup Earthquake Cake is not only super easy to make, but it’s also a showstopper that will have everyone asking for seconds. Trust me, once you take that first bite, you’ll be hooked!
Why You’ll Love Indulgent Reese’s Chocolate Peanut Butter Cup Earthquake Cake
- Fast
- Easy
- Giftable
- Crowd-pleasing
Ingredients
- 1 box chocolate cake mix – The base for our delicious cake.
- 1 cup water – To bring the cake mix to life.
- 1/2 cup vegetable oil – For moisture and richness.
- 3 large eggs – Binding everything together.
- 1 cup creamy peanut butter – The star of the show!
- 1 cup powdered sugar – To sweeten up that peanut butter.
- 1 cup chocolate chips – Because you can never have too much chocolate.
- 1 cup Reese’s peanut butter cups, chopped – For that extra peanut butter goodness.
- 1/2 cup milk – To keep the cake moist.
- 1/2 cup chopped nuts (optional) – For a delightful crunch.
- Whipped cream (for serving) – A perfect finishing touch!
How to Make Indulgent Reese’s Chocolate Peanut Butter Cup Earthquake Cake
- Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan—this will help your cake slide out easily later!
- Mix the Cake Batter: In a large mixing bowl, combine the chocolate cake mix, water, vegetable oil, and eggs. Mix until well combined and smooth. I love using a hand mixer for this part, but a whisk works just fine too!
- Prepare the Peanut Butter Layer: In a separate bowl, mix together the creamy peanut butter and powdered sugar until well combined and smooth. You might want to taste it—it’s hard not to!
- Layer the Cake: Pour half of the chocolate cake batter into the prepared baking pan. Drop spoonfuls of the peanut butter mixture on top of the batter, then pour the remaining chocolate batter over it, covering the peanut butter layer.
- Add Chocolate Chips: Sprinkle the chocolate chips and chopped Reese’s peanut butter cups evenly over the top of the cake batter. This is where things get really indulgent!
- Bake the Cake: Bake in the preheated oven for 30-35 minutes, or until a toothpick inserted in the center comes out clean. The house will smell heavenly!
- Cool and Serve: Allow the cake to cool in the pan for about 10 minutes before serving. Optionally, serve with whipped cream and sprinkle with chopped nuts for added texture. Enjoy every bite!
Substitutions & Additions
If you want to mix things up a bit, consider these fun substitutions:
- Use a different cake mix, like vanilla or red velvet, for a unique twist.
- Try crunchy peanut butter for additional texture.
- Add a layer of caramel sauce for even more indulgence.
Tips for Success
- Make sure to grease your pan well to avoid any sticking issues.
- If your cake isn’t baking evenly, try rotating it halfway through.
- For a make-ahead option, prepare the batter the night before and bake it in the morning.
How to Store Indulgent Reese’s Chocolate Peanut Butter Cup Earthquake Cake
This cake is best enjoyed fresh, but if you have leftovers, store them in an airtight container at room temperature for up to 3 days. You can also refrigerate it for up to a week; just be sure to let it come back to room temperature before serving for the best flavor!
FAQs
- Can I freeze this cake? Yes! Wrap it tightly in plastic wrap and foil, and it can last in the freezer for up to 3 months.
- Can I make this cake gluten-free? Absolutely! Just substitute the chocolate cake mix with a gluten-free version.
- What can I serve with this cake? A scoop of vanilla ice cream or a dollop of whipped cream makes for a perfect pairing!
This Indulgent Reese’s Chocolate Peanut Butter Cup Earthquake Cake is sure to be a hit at any gathering. For more delicious recipes, check out my Apple Pie or Berry Crumble for treats you will love! And if you love finding tasty inspiration, don’t forget to follow us on Pinterest!
Indulgent Reese’s Chocolate Peanut Butter Cup Earthquake Cake

Ingredients
Equipment
Method
- Step 1: Preheat your oven to 350°F (175°C). Grease and flour a 9x13 inch baking pan.
- Step 2: In a large mixing bowl, combine the chocolate cake mix, water, vegetable oil, and eggs. Mix until well combined and smooth.
- Step 3: In a separate bowl, mix together the creamy peanut butter and powdered sugar until well combined and smooth.
- Step 4: Pour half of the chocolate cake batter into the prepared baking pan. Drop spoonfuls of the peanut butter mixture on top of the batter, then pour the remaining chocolate batter over it.
- Step 5: Sprinkle the chocolate chips and chopped Reese’s peanut butter cups evenly over the top of the cake batter.
- Step 6: Bake in the preheated oven for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
- Step 7: Allow the cake to cool in the pan for about 10 minutes before serving. Optionally, serve with whipped cream and sprinkle with chopped nuts.









