Crockpot Reese’s Cake

Mar 24, 2025Updated Jul 29, 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.

chocolate cake with peanut butter frosting with reeses on top.

If you’re a fan of chocolate and peanut butter, this Crockpot Reese’s Cake is a must-try. It’s rich, gooey, and packed with mini Reese’s right in the batter—plus a warm, sweet peanut butter topping that takes it over the top. You don’t even need an oven, which makes it super easy for parties or last-minute dessert cravings.

What you need

Here is all you need to make this decadent dessert. The full recipe is in the recipe card below the images.

ingredients for reese's peanut butter cake on a table.

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.

Melted peanut butter and powdered sugar.

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.

overhead shot of reese's peanut butter cake.

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.

scoop out of peanut butter chocolate cake.

Crockpot Reese’s Cake

4.59 from 17 votes

Prep Time: 15

Cook Time: 2

Total Time: 2 15

Servings:

By: Sarah Olson

This rich and gooey Reese's peanut butter cake made in the crockpot is the ultimate chocolate-peanut butter dessert for any occasion.

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How to Video

Equipment

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

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).

Nutrition

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? Leave a comment below!

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.