Harry Potter’s treacle fudge

This is the fudge that Hagrid attempted to make for Harry Potter in the first book of the epic book series. Hagrid’s attempt didn’t come out quite right, but yours will. This molasses-based candy will require a bit of elbow grease but is worth it in the end.

I remember the first time a coworker talked to me about Harry Potter. Honestly, I thought it sounded silly. Why would I want to read a children’s book about a wizard? My coworker persisted and let me borrow her first three books.

Needless to say, I was hooked.

While I wasn’t one of the die-hard fans that stood in line to buy the next available book, I did try to speed read through them as soon as I got my hands on a copy. I am proud to say that I own all of the books and hope that my daughter enjoys reading them one day.

One of the treats that has always intrigued me in the book series is the treacle fudge. Not being from the UK, I had no idea what treacle was (it’s molasses). Imagine my surprise when I found a copy of the unofficial Harry Potter cookbook in the library one week. I immediately checked it out.

Delighted, I found the treacle fudge recipe in the book. Now before you get started, I wanted to let you know that this fudge will require some work. It will need to be stirred for about 15-20 minutes before allowing it to set. My arm got tired throughout so I took some breaks and my fudge turned out just fine. Just don’t let the stirring scare you because I promise it’s worth it.

Hey, if it’s good enough for Harry, it’s good enough for me.

harry potter's treacle fudge
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5 from 2 votes

Harry Potter's treacle fudge

This is the fudge at Hagrid attempted to make for Harry Potter in the first book of the epic book series
Prep Time25 minutes
Cook Time15 minutes
Chilling time2 hours
Total Time40 minutes
Course: Dessert
Cuisine: American
Keyword: Candy
Servings: 64
Author: Eva Bakes


  • 1 cup granulated sugar
  • 1 cup dark brown sugar packed
  • 1 stick (1/2 cup) unsalted butter
  • 1/2 cup heavy cream
  • 2 Tablespoons black treacle or dark molasses
  • 1/4 teaspoon cream of tartar
  • 1 teaspoon vanilla extract


  • Generously grease or line a standard 8"x8" square pan and set aside.
  • In a medium sized saucepan, mix together all of the ingredients except for the vanilla. Heat on medium-high and stir until the butter has completely melted.
  • Allow the mixture to cook until it reaches 240 degrees F on a candy thermometer. Do not mix during this stage. Once the mixture comes to temperature, remove the pan from the stove and stir in the vanilla.
  • Let the mixture sit for about 5 minutes.
  • Now, roll up your sleeves and keep stirring (and stirring and stirring) until the mixture becomes super thick - to the point where you can no longer stir because it's so dense. It will resemble a very thick brownie batter consistency. I took a few breaks here and there to rest my arms, but I would say it took a good 15 minutes or so of constant stirring.
  • Transfer the fudge to your prepared pan and smooth out the top. Chill in your refrigerator until firm, about 1-2 hours. Slice and serve.


Leftover fudge should be stored in an airtight container in the refrigerator.
Source: The Unofficial Harry Potter Cookbook by Dinah Bucholz


  1. Hayden Woods
    April 8, 2020 / 3:41 pm

    5 stars
    The recipe worked and the fudge was AMAZING!

    • evabakes
      April 8, 2020 / 5:37 pm

      Whoo hoo!! So glad you enjoyed it, Hayden!

    May 6, 2021 / 8:24 am

    Can you sub the cream for milk?

    • evabakes
      May 6, 2021 / 10:33 am

      I haven’t tried it, but I’m not sure if it will work. Milk is thinner than cream, so the fudge may not set up/solidify. My recommendation is to stick with the cream if possible.

    • GPSJane
      August 13, 2023 / 1:53 pm

      You can. There will be less fat and it will take longer to evaporate the water and reach Em the right temp but it will work fine.

    May 6, 2021 / 10:40 am

    Okay dokay

  4. Frank McCollum
    December 2, 2021 / 6:52 pm

    I’m a huge Harry Potter fan. Even have my own robe and wand. I also have a game on my phone. And have a quidditch game. I was so happy and excited to find a recipe and find out there is a cook book. Can’t wait to go and buy it. And try the fudge. I even made a deal with my mom since I’m not a good cook. If she makes it I’ll stir it. Thanks for everything.

    • evabakes
      December 3, 2021 / 1:58 pm

      I love how much of a Harry Potter fan you are! Hope you and your mom make and enjoy this fudge!

  5. Frank McCollum
    December 4, 2021 / 4:24 pm

    Thank you. And the fudge is great.

    • evabakes
      December 5, 2021 / 9:18 pm

      Yay – so glad you enjoyed it, Frank!

  6. L. Jules
    December 5, 2021 / 4:20 pm

    Can I use a hand mixer instead of all yhe stirring?

    • evabakes
      December 5, 2021 / 9:20 pm

      I haven’t tried it myself, but I think a hand mixer should work! If you try it, please let me know how it turns out!

  7. Ravyn
    December 21, 2023 / 7:42 pm

    5 stars
    I used a hand mixer for 15 minutes and it worked great! Wonderful recipe, especially for Christmas!

    • evabakes
      December 24, 2023 / 9:03 am

      Great idea, Ravyn!

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