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The Magical Slow Cooker » Recipes » Dessert » Reese’s Peanut Butter Cup Chocolate Cake {Crockpot}

Reese’s Peanut Butter Cup Chocolate Cake {Crockpot}

by Sarah Olson on January 20, 2022 64 Comments

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collage of peanut butter chocolate cake for pinterest

Make a decadent Slow Cooker Peanut Butter Cake for your family. It has warm chocolate cake, melty peanut butter frosting, and topped with Reese’s peanut butter cups.

If you love a warm dessert, using your crockpot is the way to go. We also make blackberry cobbler and lava cake in our crockpot!

close up of chocolate cake with warm peanut butter icing

Can I make cake in a crockpot?

  • You can make cake in the crockpot! It’s a perfect environment to make a warm cake that you spoon out instead of slicing. Be sure to watch the timing for a crockpot cake can burn easily.
  • Warm cake in the slow cooker is perfect for family get-togethers, BBQ’s, birthday party or even a church potluck.

Ingredients

  • Devil’s food cake mix – Can use any chocolate cake mix you like.
  • Wet ingredients for cake – Eggs, melted butter (I use melted butter instead of oil) and water
  • Warm glaze – Melted peanut butter and powdered sugar make the best topping for this chocolate cake.
  • Reese’s Peanut Butter Cups – Mini peanut butter cups go inside the batter and halved bite size Reese’s go on top for garnish.
ingredients for peanut butter chocolate cake on table in front of slow cooker

Step-by-Step Directions

Step One – Mix a deviled food cake mix, eggs, melted butter, and water in a large bowl. Stir in a small bag of mini resee’s peanut butter cups.

Step Two – Spray an oval slow cooker with non-stick spray and pour the batter into it.

Step Three – Cook on HIGH for 2 hours without opening the lid during the cooking time.

chocolate cake with warm peanut butter icing on top. With peanut butter cups on top.

Step Four – Combine melted peanut butter and powdered sugar when the cooking time is done. Pour this over the hot cake layer.

Step Five – Top with halved bite-sized peanut butter cups. Serve and enjoy!

How to serve warm cake

  • Scoop the warm cake into serving bowls.
  • Top with ice-cream or whipped cream.
  • Have a bottle of chocolate syrup ready for garnish if desired.
  • This is a great dessert to let you guests serve themselves, they can choose how much dessert and toppings they prefer.
chocolate cake in slow cooker with peanut butter icing, wooden spoon in it.

Recipe FAQs and Variations

Can I make this in the oven?

Yes! You can make Reese’s Peanut Butter Cake in the oven. Bake in a 9×13 pan, and bake as directed on the cake mix box.

Variations

Coffee – Use freshly brewed coffee in place of the water; it will have a slight hint of coffee and add depth of flavor to the cake.
White Cake Mix – Not a huge chocolate fan? Use a white cake mix instead of chocolate, and you will have wonderful vanilla and peanut butter dessert.
Reese’s Pieces – Use Reese’s pieces instead of cups for a fun twist! Or you can add a handful of both for some added texture.

What does the peanut butter glaze taste like?

The topping in this recipe tastes like the peanut butter topping at Baskin Robbins. It’s not overly sweet and goes great with chocolate and ice cream.

How to store leftovers?

If desired, you can let the cake cool on the counter and place the entire slow cooker insert in the fridge. Flip the lid over to make it fit better in the refrigerator. Or spoon into airtight containers (this can be messy).

Can I freeze this cake?

Freeze the leftover peanut butter cake in airtight containers for up three months. Thaw, warm, and enjoy!

How do I reheat this cake?

Warm single servings in the microwave for about 30 seconds.

bowl of chocolate peanut butter cake with ice cream on top.

Want to make more magic in your crockpot? Stay up to date and subscribe to my newsletter and follow along on Facebook, Instagram, Pinterest, Tik Tok, and YouTube.

peanut butter chocolate cake in slow cooker with wooden spoon in it.

Reese’s Peanut Butter Cup Chocolate Cake {Crockpot}

4.98 from 38 votes
Warm Chocolate Cake topped with melted peanut butter and chocolate peanut butter candy.
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Course: Dessert
Cuisine: American
Prep Time: 15 minutes
Cook Time: 2 hours
Total Time: 2 hours 15 minutes
Servings: 10
Calories: 607kcal
Author: Sarah Olson

Equipment Needed:

  • Slow Cooker – 5-quart oval or larger

Ingredients:

  • 15.25 oz. devil’s food cake mix
  • 1 cup water
  • 1/2 cup salted butter melted
  • 3 large eggs
  • 8 oz. pkg. mini Reese’s peanut butter cups

For the topping

  • 1 cup creamy peanut butter
  • 3 Tbsp. powdered sugar
  • 10 bite size Reese’s peanut butter cups

Slow Cooker Size:

  • 6 quart oval
US Customary – Metric

Instructions:

  • In a large bowl mix together the cake mix, water, butter, and eggs until smooth. Some lumps are ok, that is normal. Stir in the mini peanut butter cups.
  • Spray the slow cooker with non stick spray. Add the batter to the slow cooker and spread out into an even layer.
  • Cover and cook on HIGH for 2 hours without opening the lid during the cooking time.
  • When the cooking time is done, remove the cake from the heat, to keep it from continuing to cook.
  • In a small pan set over medium heat on the stove top, add the peanut butter. Stir until melted and smooth, watch closely because it will burn quickly. Add the powdered sugar and whisk until smooth.
  • Pour the sweetened peanut butter over the warm cake. Top with halved Reese's peanut butter cups.
  • Serve and enjoy! Great with ice cream or whipped cream.
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How to Video:

Recipe Notes:

Can I make this in the oven?
Yes! You can make Reese’s Peanut Butter Cake in the oven. Bake in a 9×13 pan, and bake as directed on the cake mix box.
How to store leftovers?
You can let the cake cool on the counter and place the entire slow cooker insert in the fridge if desired. Flip the lid over to make it fit better in the fridge. Or spoon into airtight containers (this can be messy).
Variations
  • Coffee – Use freshly brewed coffee in place of the water, it will have a slight hint of coffee and add depth of flavor to the cake.
  • White Cake Mix – Not a huge chocolate fan? Use a White cake mix instead of chocolate and you will have a wonderful vanilla and peanut butter dessert.
  • Reese’s Pieces – Use Reese’s pieces instead of cups for a fun twist! Or you can add a handful of both for some added texture.

Nutrition Information:

Calories: 607kcal | Carbohydrates: 57g | Protein: 13g | Fat: 39g | Saturated Fat: 13g | Cholesterol: 75mg | Sodium: 682mg | Potassium: 430mg | Fiber: 3g | Sugar: 37g | Vitamin A: 370IU | Calcium: 109mg | Iron: 3mg

Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.

Made this recipe?I want to see your photos! Tag me on Instagram @themagicalslowcooker

More Slow Cooker Dessert Recipes:

  • Slow Cooker German Chocolate Spoon Cake
  • Slow Cooker Lemon Spoon Cake
  • Slow Cooker Pineapple Spoon Cake
  • Slow Cooker Pumpkin Spoon Cake
  • Slow Cooker Chocolate Lava Cake

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    104779 shares
    • 26844

    Filed Under: Dessert, Most Popular Recipes

    Comments

    1. Mark says

      November 14, 2021 at 11:15 am

      Can you make this then travel a couple hours.

      Reply
      • Sarah Olson says

        November 14, 2021 at 11:29 am

        Yes, it will be fine 🙂

        Reply
    2. Joanne says

      February 8, 2021 at 5:23 pm

      5 stars
      This is the most delicious chocolate cake with the peanut butter icing! You won’t be disappointed! ❤️❤️❤️

      Reply
    3. Anna says

      February 2, 2021 at 3:41 am

      5 stars
      OMG this looks simply delish.

      Reply
    4. Marilyn Tyree says

      January 29, 2021 at 5:29 pm

      5 stars
      I have tried this twice and it burns before it gets done. I have a new crock pot, and it works great with other stuff. Any suggestions?

      Reply
      • Sarah Olson says

        January 29, 2021 at 7:27 pm

        It may cook a touch too hot for cakes. Are you leaving the lid on?

        Reply
    5. sally says

      January 29, 2021 at 3:45 pm

      I like to make one pot things. Im old and buy myself It would be nice to see easet stuf to make for one with left overs.

      Reply
    6. Kim says

      January 28, 2021 at 5:34 pm

      Can this be made in a 9 x 13 crockpot?

      Reply
      • Sarah Olson says

        January 28, 2021 at 8:07 pm

        I’m sure you can Kim. May not take as long for it will make it thinner.

        Reply
    7. Debbie Irvin says

      November 7, 2020 at 12:05 pm

      Hi will this work in a round crock pot, or will that be too small?

      Reply
      • Sarah Olson says

        November 7, 2020 at 12:33 pm

        It may be too small. You could cut it in half.

        Reply
    8. Winnie says

      October 18, 2020 at 4:22 pm

      Easy and delicious ,

      Reply
    9. Courtney Brooks says

      September 5, 2020 at 6:30 pm

      What’s the best way to store what is left?

      Reply
      • Sarah Olson says

        September 5, 2020 at 6:58 pm

        If you have room in the fridge you can put the entire slow cooker insert and lid in there. Or spoon into a large storage container.

        Reply
    10. Rob says

      May 29, 2020 at 5:48 pm

      Not bad

      Reply
    11. Anne says

      May 15, 2020 at 12:17 pm

      Hello. Can I use a chocolate cake mix instead of devils cake? I havent been able to find a devils cake mix
      .

      Reply
      • Sarah Olson says

        May 15, 2020 at 3:25 pm

        Yes! that will work just as well.

        Reply
    12. Elle says

      May 12, 2020 at 12:11 pm

      Can you still make this as a poke cake? When making a poke cake do you wait for cake and the Pb frosting to cool before pouring it over? I’m actually baking the cake in the oven for my son’s bday. Curious as whether to poke or not.

      Reply
      • Bridget S says

        May 23, 2020 at 6:56 am

        did you end up making this as a poke cake? I wanted to do the same but was unsure of whether to follow the directions on the box, or the directions here. Did the filling and the cake have to cool first?

        Reply
        • CW says

          September 17, 2020 at 7:22 pm

          I’m wondering about doing a poke cake too. Any tips??

    13. Debbie says

      May 7, 2020 at 2:43 pm

      How would you convert the baking time for a round crock pot? Any suggestions?

      Reply
      • Sarah Olson says

        May 7, 2020 at 3:06 pm

        Hi Debbie! Just follow the 9×13 instructions on the box. It will work great.

        Reply
      • Debbie says

        May 7, 2020 at 7:51 pm

        I actually figured it out on my own. Instead of cooking on high for 2 hours I cooked on low for 2 1/2 hours. It came out perfect!!

        Reply
    14. Amanda says

      March 17, 2020 at 4:57 pm

      4 stars
      As I always tell my students, “Make sure and read the directions before starting.” Lol! I used my 4.5 quart slow cooker, and it burnt on sides and raw in the middle. Completely my fault. Recipe says 6 quart cooker. I’m going to try again when I get a bigger slow cooker.

      Reply
      • Barbaara says

        April 11, 2020 at 12:23 pm

        I had a 4 quart and had a similar thing not completely burned but overdone. I ground out the cake with a fork and mixed it all together. It looked like a batter half baked. I baked it in a 13×9 pan on 350 for 15 minutes, made the icing and it turned out fine!

        Reply
    15. Luann says

      February 26, 2020 at 2:16 pm

      5 stars
      Amazing. Would not have thought it to be so. You have to try it.

      Reply
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