Crockpot Reese’s Peanut Butter Cake
76 Comments Mar 24, 2025
Updated Apr 03, 2025
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Make a decadent Slow Cooker Reese’s Peanut Butter Cake for your family. It has warm chocolate cake and melty peanut butter frosting and is topped with Reese’s peanut butter cups. If you love warm dessert cuisine, skip using the cake pan and the oven for your crockpot. It is the perfect way to go. We also make
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Did you know you can make a delicious, homemade cake right in your crockpot? The slow cooker creates a warm, steamy environment that’s ideal for baking moist, tender cakes you scoop out with a spoon instead of slicing. Just keep an eye on the timing—crockpot cakes can go from perfectly done to overcooked on the edges quickly if left too long.
There’s just something magical about a warm peanut butter dessert and this reese’s peanut butter cake will hit the spot.
Key Ingredients
Making a crockpot cake couldn’t be easier! Here is what you need below. Find the full recipe in the recipe card below the images.
- Devil’s food cake mix – You can use any chocolate cake mix you like. We also use chocolate cake in our slow cooker s’mores cake recipe.
- 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.
How to make Reese’s Cake in the Crockpot
Step One – Mix a deviled food cake mix, eggs, melted butter, and water in a large bowl. Stir in a small bag of mini Reese 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.
Step Four – Add the peanut butter to a small pan set over medium heat on the stove top.
Step Five – Stir until melted and smooth and then add the powdered sugar, whisking until smooth.
Step Six – Pour the sweetened creamy peanut butter frosting over the warm cake. Top with halved bite-sized peanut butter cups. Serve and enjoy!
Variations
My approved variations for this easy cake!
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.
My Serving Suggestions
Here is how I serve this chocolate peanut butter cake:
- Scoop the warm cake into serving bowls.
- Top with ice cream or whipped cream. (Try this Reese’s Peanut Butter Cup Ice Cream recipe) You can also provide chopped peanut butter cups, reese’s pieces, mini chocolate chips, and/or diced strawberries for an extra topping choice.
- Have a bottle of chocolate syrup ready for garnish if desired.
- This is a great dessert to let your guests serve themselves; they can choose how much dessert and toppings they prefer.
Recipe FAQs
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 recipe mix box. It will still taste delicious!
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.
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). Freeze the leftover peanut butter cake in an airtight container for up three months. Warm single servings in the microwave for about 30 seconds.
More Slow Cooker Dessert Recipes:
- Satisfy your chocolate cravings with indulgent crockpot desserts like Slow Cooker Better Than Sex Cake, made with layers of chocolate cake, caramel, and whipped topping.
- Try rich and creamy Slow Cooker Fudge or warm, chewy Crockpot Brownies that cook up perfectly.
- For something extra decadent, Crockpot Chocolate Lava Cake oozes with melty chocolate in every bite.
- If you’re craving something fruity, the Slow Cooker Blackberry Cobbler delivers a sweet-tart flavor with a golden, cakey topping that’s hard to resist.
Crockpot Reese’s Peanut Butter Cake Recipe
How to Video
Equipment
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
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.
Sarah’s Notes
- 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.
- To store, 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).
- Reheat by heating single servings in the microwave for about 30 seconds.
- 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
Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.
I just made this today. As soon as I put in the last peanut butter cup on top of the peanut butter frosting, my husband stuck his spoon in to get a scoop of cake. He said he couldn’t wait, it smelled so good. He loved it! I thought it was good too but the cake needs to cool down before eating. Also, I suggest less peanut butter for the frosting. It was a bit thick but still yummy.
Haven’t made yet but had a question. Can you make the peanut butter early and reheat when needed? Would like to take somewhere then reheat up the peanut butter topping & serve once I’m there. Thank you
Burned in the crockpot. Disappointed bc it looked yummy but was a waste. Just make the cake in the oven and do a peanut butter frosting.