Hot Fudge Slow Cooker Brownies!  Just 5 minutes of prep and a few simple ingredients go into this delicious lava-cake inspired dessert! Your guests will rave about this one and you’ll love how easy it is to make!

Pouring chocolate sauce over a slow cooker brownie

I love my slow cooker and use it several times every week.  It makes such tender meats, flavorful soups and amazing pasta sauces!  Did you know you can also cook dessert in the slow cooker too?!  Amazing right?

This recipe is from my friend Hayley’s new book, Out of the Box Desserts.  Hayley blogs over at the Domestic Rebel and makes AWESOME desserts so I was pretty excited to get my hands on a copy of this book.  I have to tell you friends, this is one of those dessert books you’re going to end up using over and over!

Out of the box desserts cookbook

All of the desserts in this book need minimal prep and with fall upon us, school, homework and soccer practice several times each week I’m ALL about quick and easy.

There are tons of amazing recipes I’m dying to try and you’ll find everything from cookies & blondies to cheesecake & candy. You’re going to want to get your hands on a copy (you can grab it on Amazon here) and if you’re anything like me, pretty much every page will be marked!

Brownies cooking in a black slow cooker

When I saw this Slow Cooker Brownie recipe, I honestly couldn’t wait to give it a try.  I mean this chocolate dessert is like lava cake meets brownie…  it’s lusciously chocolatey and ooey gooey irresistible.

If you haven’t made a dessert in the slow cooker yet, you’re going to love this! It’s especially perfect if you’ve got guests coming by because you can prep this ahead and it’s warm, gooey and ready to serve when you are.

Hot Fudge Slow Cooker Brownie with vanilla ice cream and chocolate sauce on a white plate

To make this extra quick, it starts with a box mix which means one bowl and very little prep time!  With just a few ingredients and 5 minutes you’ll pour the batter into the slow cooker, put the lid on and just walk away…  talk about a dream dessert.

Note:  I use this Slow Cooker here for this recipe.  It’s the perfect size and mine takes about 2 1/2-3 hours.

Hot Fudge Slow Cooker Brownie with vanilla ice cream and chocolate sauce on a white plate
4.68 from 25 votes↑ Click stars to rate now!
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Hot Fudge Slow Cooker Brownies

Hot Fudge Slow Cooker Brownies! Just 5 minutes of prep and a few simple ingredients go into this delicious lava-cake inspired dessert!
Prep Time 5 minutes
Cook Time 2 hours
Total Time 2 hours 5 minutes
Servings 8 servings
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  • 1 box fudge brownie mix (9×13 pan size)
  • cup oil
  • ¼ cup water
  • 2 eggs


  • ¾ cup hot water
  • 1 jar hot fudge sauce 12 ounces


  • Grease a 6 QT slow cooker very liberally with cooking spray.
  • In a large bowl, combine the brownie mix, oil, ¼ cup water, and eggs until well mixed. Pour the batter into the greased slow cooker.
  • Whisk together the hot fudge sauce and hot water and pour over the brownie batter (do not stir). Top with the lid and cook on HIGH for 2 ½ – 3 hours or until the edges are set (the center will be slightly gooey).
  • Serve with ice cream and additional fudge sauce if desired.
4.68 from 25 votes

Nutrition Information

Calories: 181 | Protein: 1g | Fat: 19g | Saturated Fat: 1g | Cholesterol: 40mg | Sodium: 17mg | Potassium: 15mg | Vitamin A: 60IU | Calcium: 6mg | Iron: 0.2mg

Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.

Course Dessert
Cuisine American

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About the author

Holly is a wine and cheese lover, recipe creator, shopping enthusiast and self appointed foodie. Her greatest passion is creating in the kitchen and making deliciously comforting recipes for the everyday home cook!
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Recipe Rating


  1. Also made the 3 ingredient vanilla ice cream. With those 3 recipes im in chocolate yummy fudge love. Great recipes

  2. Love love the simplicity of this recipe! I used my own homemade brownie recipe. I used the wicked good hot fudge recipe as wellfabulous5 stars

  3. To make a 9×13 pan I have to use 2 boxes of brownie mix. Is the egg, water & oil amounts the same if I’m using the two boxes? Or should I double it.

  4. Yikes, this was awful. I have to agree with the 11/4/18 comment from “May”. Very odd taste and a bit sour.

    I have enjoyed the recipes I have tried here in the past, but this one definitely is a pass.1 star

  5. This recipe turned out absolutely great! It was a hit at our potluck at work. I bought an extra jar of hot fudge sauce just for an additional topping, but I actually added it into the crock pot once the brownie cooked completely. It made it a little more gooey and lava cake-like. :)5 stars

  6. My brownie mix calls for 1 egg and 1/3 cup oil. Do I follow the box’s instructions or this recipe?

  7. I was so looking forward to these thinking they were foolproof, but found them to be INCREDIBLY dry and they had an odd flavor that I couldn’t quite place. Followed the directions exactly as written, too. I know it isn’t my crockpot because I’ve had no issues like this before. Hope other people have better luck than I did because I was very disappointed ):1 star

  8. Can this be made is a smaller crockpot mine is 4 qt. I want how deep is it in a 6 qt so I can adjust for the smaller size and time if needed.

    1. I have only made this in a 6 quart slow cooker. I think it would work fine, but given that it will be a bit thicker, it may take a bit more time to cook. Let us know how it works out for you Carol!

  9. Hi Holly,

    This looks amazing.

    We are going away for a weekend in November with other 4 families. I have travelled with my slow cooker for years now and last winter we introduced it to some of our friends. They were surprised on easy it is and inexpensive it was simply by cooking in the hotel room. With 2 growing teenagers, eating at a restaurant is $80+ per meal. I can feed my entire family for under $25.

    I was wondering if anyone tried to double the recipe for a larger group? :)

    1. I love the idea of having a meal in the slow cooker while travelling! I haven’t tried doubling this recipe. While it would likely work, you may need to adjust the cook time.

    1. I think that would work although I’ve only tried this recipe as written. I’d love to hear how it works if you do try it!

  10. When you make the fudge brownies do you put paper towels under the slow cooker lid? I have wondered about the moisture on the brownies.

    1. I didn’t put a paper towel in with these. Unlike a regular brownie that you would cut into squares you want these kind of moist and you scoop them out with a spoon.

  11. These look seriously amazing! I’m a huge brownie fan… and an even bigger fan of slow cooker recipes! Thanks for sharing!

  12. Yeah, I’m drooling weirdly hard over here right now…slow cooker brownies sound like the most amazing thing EVER. Can’t wait to try them!