Prep time: 20 mins | Total time: 2 hrs 50 mins | Servings: 12
This Reese’s Peanut Butter Cup Swirl Cake is the ultimate treat perfect for all occasions! Rich, gooey, and decadent. It is super easy to whip up using your trusty slow cooker.
Ingredients
Cake:
3 eggs
1 box Betty Crocker™ Super Moist™ yellow cake mix
1 c. water
1/2 c. creamy peanut butter
1/2 c. chocolate-flavored syrup
1/3 c. butter, softened
Toppings:
2 tbsp chocolate-flavored syrup
3 tbsp creamy peanut butter
1 c. powdered sugar
20 Reese’s peanut butter cups miniatures, unwrapped and cut in half
2 to 3 tbsp milk
How to make Slow-Cooker Reese’s™ Peanut Butter Cup Swirl Cake
Step 1: Using cooking spray, grease a 5 to 6-quart oval slow cooker. Place the cake mix, water, eggs, 1/2 cup peanut butter, and butter in a large bowl. Beat using an electric mixer for 30 seconds on low. Adjust the speed to medium and beat for another 2 minutes, scraping the bowl.
Step 2: To a medium bowl, transfer 2/3 c. of the batter, then add half c. chocolate syrup. Mix well to make the chocolate fudge batter.
Step 3: Into the slow cooker, spoon half of the peanut butter batter, then all of the chocolate fudge batter. On top, add the rest of the peanut butter batter. In a circular motion, swirl the batter using a knife.
Step 4: Put the lid on and set to cook for 1 hour 45 minutes to 2 hours 15 minutes on high heat or until a toothpick inserted in the cake comes out clean. Then, turn the slow cooker off. Remove the cover and take the ceramic base out of the slow cooker and onto a cooling rack. Allow the cake to cool for about 15 minutes.
Step 5: Place 3 tbsp peanut butter and 2 tbsp milk in a medium bowl. Using a whisk, beat the ingredients until smooth. Then, add the powdered sugar and mix until smooth. Slowly add in 1 tbsp milk until you have reached your desired consistency.
Step 6: Over the cake, spread the peanut glaze and drizzle with the chocolate syrup. On top, sprinkle the peanut butter cups.
Nutrition Facts:
460 Calories, 20g Total Fat, 8g Protein, 62g Total Carbohydrate, 42g Sugars

Ingredients
- Cake:
- 3 eggs
- 1 box Betty Crocker™ Super Moist™ yellow cake mix
- 1 c. water
- 1/2 c. creamy peanut butter
- 1/2 c. chocolate-flavored syrup
- 1/3 c. butter, softened
- Toppings:
- 2 tbsp chocolate-flavored syrup
- 3 tbsp creamy peanut butter
- 1 c. powdered sugar
- 20 Reese's peanut butter cups miniatures, unwrapped and cut in half
- 2 to 3 tbsp milk
Instructions
Step 1: Using cooking spray, grease a 5 to 6-quart oval slow cooker. Place the cake mix, water, eggs, 1/2 cup peanut butter, and butter in a large bowl. Beat using an electric mixer for 30 seconds on low. Adjust the speed to medium and beat for another 2 minutes, scraping the bowl.
Step 2: To a medium bowl, transfer 2/3 c. of the batter, then add half c. chocolate syrup. Mix well to make the chocolate fudge batter.
Step 3: Into the slow cooker, spoon half of the peanut butter batter, then all of the chocolate fudge batter. On top, add the rest of the peanut butter batter. In a circular motion, swirl the batter using a knife.
Step 4: Put the lid on and set to cook for 1 hour 45 minutes to 2 hours 15 minutes on high heat or until a toothpick inserted in the cake comes out clean. Then, turn the slow cooker off. Remove the cover and take the ceramic base out of the slow cooker and onto a cooling rack. Allow the cake to cool for about 15 minutes.
Step 5: Place 3 tbsp peanut butter and 2 tbsp milk in a medium bowl. Using a whisk, beat the ingredients until smooth. Then, add the powdered sugar and mix until smooth. Slowly add in 1 tbsp milk until you have reached your desired consistency.
Step 6: Over the cake, spread the peanut glaze and drizzle with the chocolate syrup. On top, sprinkle the peanut butter cups.