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    Home » Recipes » Brownies

    Super Quick Thick Brownie Frosting

    By Erin Clarkson on Oct 16, 2022 (updated Nov 30, 2025)
    5 from 38 reviews
    51 community comments
    This post may contain affiliate links.

    Jump to Recipe

    Super quick Brownie Frosting comes together in less than five minutes with only four ingredients. It is super thick, and the perfect frosting for brownies!

    close up of frosted brownies

    I love a good homemade brownie recipe - they are rich, fudgy, and super easy to make. I am married to someone who thinks that adding a simple chocolate icing onto basically anything will make it better - especially to my fudgy brownies.

    In our house, we call this brownie frosting 'shitty chocolate icing' - as in, the super quick, thick, chocolate icing that our Mums used to make as kids.

    It's just the best - comes together in five minutes, and goes well on everything. Rich has been asking me to put in on the blog for years now, and now I have finally found an appropriate name for it, here we are - the perfect chocolate frosting for brownies.

    This easy brownie icing is everything you need for that perfect, thick, crusty icing that brings back an instant hit of nostalgia. It's not super smooth - it sets with a delicate crust, and is just the best thing ever.

    I love using this recipe to make frosted brownies - I also use a slightly thinner version on my cosmic brownie recipe, but it is not just an icing for brownies - you could also use it to finish off my easy banana bread, or as a simple finish to my chocolate chip cookie bars.

    bowl of chocolate brownie frosting
    chocolate frosting on brownie

    How to get clean slices on a brownie

    Here are a few top tips to make sure you get a perfect cut on your brownie:

    • Make sure the brownies are properly chilled. I like to make sure that both the brownie and the chocolate frosting are set. If you don't like cold brownies, you can leave them out after you cut them and they will come back to room temperature.
    • Use a super sharp knife. This is important for getting a clean cut on anything.
    • Cut in one motion - I use a knife with a large blade and push down evenly rather than levering the knife down.
    • Wipe the blade between cuts. I don't use a warmed blade, but if needed I do rinse it and dry well between cuts.

    My Top Brownie Tips

    • Get all my tips and tricks on how to get the perfect crinkly brownie top in my fudgy homemade brownie recipe.
    • Plus, follow this easy Instagram video tutorial to cleanly cut homemade brownies!
    Fudgy brownies on wax paper with frosting

    ❤️ Made this recipe and love it? ❤️

    I would LOVE for you to leave me a review and star rating below to let me know how you liked it! Also, please make sure to tag me on Instagram!

    Answers to your baking questions

    Over the years, many of you have asked me questions about:

    • baking in grams
    • adjusting oven temperatures
    • what kind of salt to use
    • and many more!

    I've curated and answered them all for your easy reference in this frequently asked questions post!

    Print
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    close up of frosted brownies

    Super Quick Thick Brownie Frosting

    5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 38 reviews
    • Author: Erin Clarkson
    • Prep Time: 5 minutes
    • Total Time: 5 minutes
    • Yield: 16 servings 1x
    • Category: Frosting
    • Method: One Bowl
    • Cuisine: American
    Print Recipe
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    Description

    Super quick Brownie Frosting comes together in less than five minutes with only four ingredients. It is super thick, and the perfect frosting for brownies!


    Ingredients

    Scale
    • 190g powdered sugar, sifted
    • 20g cocoa, sifted
    • Pinch of salt
    • 45g unsalted butter, at room temperature, cut into small pieces
    • 25g freshly boiled water (weigh after boiling)


    Instructions

    1. Combine the powdered sugar, cocoa, and salt in a medium bowl, then add the butter and mix until it is coated. Add the boiling water, and mix with a spatula until the butter is incorporated and the mixture is homogenous.
    2. Switch to a whisk if needed to get any lumps or remaining pieces of butter. 
    3. Use immediately - this is a crusting frosting so it does not store well and needs to be used straight away.

    Did you make this recipe?

    Tag @cloudykitchen on Instagram and use the hashtag #cloudykitchen

    Key Ingredients

    • Chocolate
    « How to Freeze Cookie Dough and Bake From Frozen
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    Filed Under: Base Recipes, Brownies, New Zealand Recipes

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      Comments

    1. caribou says

      October 21, 2022 at 6:59 pm

      so yum!

      Reply
    2. stacy says

      October 21, 2022 at 7:00 pm

      I love this frosting! It comes together so quickly and tastes great on everything!

      Reply
    3. Sasha says

      October 22, 2022 at 12:30 am

      Such an easy, quick and delicious recipe! I used it on the banana sheet cake - perfect!

      Reply
    4. Mandie says

      October 29, 2022 at 8:07 am

      Delicious! Was the perfect topping for our homemade brownies!

      Reply
      • Julia says

        August 12, 2025 at 2:21 pm

        Could this be piped out of a piping bag for a decorative edge on a brownie cake? I haven't made it before so wasn't sure if the texture would hold up.

        Reply
        • Erin Clarkson says

          August 12, 2025 at 4:06 pm

          Hi! Yes i've used it to pipe a border before!

          Reply
      • Marina Greer says

        November 06, 2025 at 1:40 pm

        SO GOOD!!!! Thank you!

        Reply
    5. Anna says

      October 31, 2022 at 7:46 am

      So good! This reminds me so much of the icing my mum used to make when we were growing up (in Aus). I used it to ice a small batch of owl cupcakes for Halloween and it was so easy and super delicious.

      Reply
    6. Brynn says

      November 25, 2022 at 10:53 pm

      Paired this frosting with the fudgy brownies and it was delicious! Both recipes were super easy!

      Reply
    7. Ellie says

      January 15, 2023 at 6:06 pm

      So easy to make and a great addition to brownies. You will never have unfrosted brownies again after giving this a try!

      Reply
    8. Eva says

      January 28, 2023 at 11:40 am

      Yum! Easy, tasty, quick. What’s not to love?

      So great to have this in my back pocket. I used it for a last-minute chocolate cake.

      Reply
    9. Kellie says

      February 17, 2023 at 5:03 pm

      So good!!

      Reply
    10. Katie says

      February 21, 2023 at 5:28 pm

      Delicious and SO EASY! The perfect late night recipe to top some basic brownies to really elevate everything. Will lean on this recipe often!

      Reply
    11. Cara says

      March 26, 2023 at 6:02 pm

      I love this frosting! It’s so easy, dairy free, and reminds me of the chocolate frosting they put on the chocolate peanut butter bars in elementary school. 🤤 I made it in my kitchen aid and it worked out just fine, no need to use the whisk attachment.

      Reply
    12. L. stone says

      June 07, 2023 at 4:59 pm

      Literally the fastest and tastiest frosting there is. Brings me back to school sheet cake which was my favorite. Super easy to make too!

      Reply
    13. Marie says

      June 29, 2023 at 10:49 pm

      Holy cow. So, first off, I am super particular about a good fudgy frosting. I usually only use my mother’s recipe which probably came from her moth. But, Erin has never let me down, so I tried this tonight for her basic brownie recipe. I am in love with this frosting! It is SO easy and amazingly good! I cannot wait to share these brownies with family this weekend-they will be a hit! Also, the frosting does set fast so make sure you are quick with a spreader! I put some sprinkles on mine and I almost wasn’t fast enough. Five stars-can’t wait to show these off!

      Reply
    14. Bri says

      July 08, 2023 at 11:06 am

      I made a batch of boxed brownies that turned out too cakey and dry. So I quickly whipped up this frosting to put on top, and it SAVED THE DAY! I had so many compliments on my baking “fail.” Also, discovering that chilled brownies are superior has legit changed my life. What would I do without Cloudy Kitchen?!

      Reply
    15. Margaret Kellogg says

      July 19, 2023 at 1:22 pm

      Used this on the Erin's sugar cookie bars and honestly what a delight. It also worked out because I had miscalculated how much butter was actually in my fridge.

      Reply
    16. Jacquelyn Hill says

      December 14, 2023 at 7:49 pm

      This stuff is the best. Throw it on any of your baked good, especially brownies and brownie cookies. So easy to make!

      Reply
    17. Annie says

      April 02, 2024 at 2:46 pm

      Delicious and perfectly nostalgic!

      Reply
    18. Erin says

      April 23, 2024 at 5:44 pm

      Oh my word this frosting is delicious! For a second I thought I measured wrong, but just keep mixing in the water and it comes together perfectly. I doubled it to frost a 9 inch square pan of the Fudgy Homemade Brownies.

      Reply
    19. Jess says

      July 13, 2024 at 6:17 am

      So I just doubled this to ice a weetbix slice and my only question is how does it end up on the slice without me eating half of it first 😂
      For real though, this is so easy, love that it gets crusty and it’s perfectly sweet. This will be my go-to icing!

      Reply
    20. Heather says

      September 27, 2024 at 6:23 pm

      Absolutely best shitty frosting I’ve ever had. Love <3

      For a while I was on an easy ganache kick. The one where you melt chocolate chips and add heavy cream. But it’s nice to mix things up and have quick snazzy things in my repertoire.

      Reply
    21. Miriam says

      December 12, 2024 at 1:22 am

      Yum yum yum ! Had it on banana cake and made it so good. Thanks for upping my shitty icing game!

      Reply
    22. Sarah S says

      January 02, 2025 at 8:36 pm

      Easy and just like my Gran used to make, old school NZ icing!

      Reply
    23. Annie says

      March 08, 2025 at 4:03 pm

      I love this recipe and I love that I can easily go back to it again and again by googling “shitty chocolate icing” even though you’ve chosen not to use that as the title. Thank you.

      Reply
      • Kelly says

        March 10, 2026 at 6:32 am

        I couldn't remember your IG handle, even though I love your page. So I searched 'Shitty Chocolate Icing' and there you were 😀 Thank you for a simple icing recipe

        Reply
        • Erin Clarkson says

          March 10, 2026 at 4:06 pm

          Hahahahhaha I love this so much!

          Reply
    24. Emily says

      April 20, 2025 at 9:40 pm

      I made this after seeing it so many time on your Insta stories, and it lives up to the hype! This stuff is so easy to make and SO good! I also made brownies from the "My Forever Brownie Recipe" and put this on top, let me tell you somehow it makes a perfect brownie even better!

      Reply
    25. Al says

      May 10, 2025 at 4:39 pm

      I used to make icing as a snack when I was a kid so this is the recipe of my dreams. I will put it in anything. Or just a spoon.

      Reply
    26. Megan says

      May 27, 2025 at 9:13 pm

      This icing is so good! I could honestly just eat it from the bowl. So easy. I’ll be using this recipe whenever I need choc icing ❤️

      Reply
    27. Miriam says

      June 13, 2025 at 11:54 pm

      Can confirm that this also works very nicely as an Afghan cookie/slice icing too. Delish!

      Reply
    28. Toni Finch says

      July 05, 2025 at 5:34 pm

      10/10. Shitty chocolate icing is superior to nearly anything else

      Reply
    29. Ashley says

      August 11, 2025 at 12:58 am

      Wow I can’t believe it was only 4 ingredients that I already had! It’s only about 3.5 tablespoons of butter if anyone’s reading it and wondering if they have enough butter. So quick and delicious!! Used it to easily frost an 8x8 pan of brownies.

      Reply
    30. Caiti says

      August 17, 2025 at 6:21 pm

      I searched up “shitty chocolate icing” after seeing it on your Instagram a few times and was surprised to discover its government name lol. I made this with Trader Joe’s vegan butter for my dairy free kiddo and it turned out great. Super simple recipe and delicious!

      Reply
      • Erin Clarkson says

        August 18, 2025 at 5:49 am

        hahaha yesss it has a bit more of a PG government name! So happy you loved!

        Reply
    31. James says

      August 18, 2025 at 4:36 am

      Dear Erin.

      This is the easiest, best tasting and most foolproof icing I’ve ever made. It’s now going on every chocolate dessert i make. Thanks for sharing.

      Reply
    32. Beth says

      October 28, 2025 at 11:12 am

      How is it dairy free if there's butter in it?

      Reply
      • Erin Clarkson says

        October 28, 2025 at 3:31 pm

        Sorry where does it say that it's dairy free?

        Reply
    33. Beth says

      October 28, 2025 at 11:17 am

      Hi, Erin! Not sure if I missed it somewhere, apologies if so...
      Is this enough for an 8x8 pan? I'd like the amount of frosting as in your photos. Just wondering if I need to double thecrecipe for a 9x13" pan. Thanks! Cant wait to try it

      Reply
      • Erin Clarkson says

        October 28, 2025 at 3:32 pm

        Hi, yes it is enough for an 8" so I would double it!

        Reply
    34. Anne C says

      November 06, 2025 at 12:18 am

      This really is the best frosting for brownies! Perfect consistency for cutting squares and the taste is just what I want to go with a rich, fudgy brownie. 10/10

      Reply
    35. Stephanie says

      December 21, 2025 at 7:04 pm

      Absolute perfection! Just what I wanted to top off cream cheese brownies.

      Reply
    36. Gwenyth says

      January 27, 2026 at 4:57 pm

      No matter what you name it, this frosting is 5 Stars. It sets up so beautifully and compliments the best brownie recipe ever.

      Reply
    37. Laine says

      February 08, 2026 at 7:57 pm

      Probably the easiest I’ve ever made. Quick to come together and perfect spread consistency. I’m gonna use this on EVERYTHING.

      Reply
    38. Delilah says

      February 08, 2026 at 8:58 pm

      Did a bad job following this recipe (didn't sift anything, microwaved the water and measured it wrong) and it still turned out great! Put it on top of rice krispy treats and was a big hit. Thank you!

      Reply
    39. Laura says

      March 06, 2026 at 1:35 pm

      15/10, no notes, A+, gold star all around. Love the crust this frosting gets as it helps retain the shape and its soooo delicious!

      Reply
    40. Laine says

      March 12, 2026 at 4:53 pm

      The BEST quick icing for ANYTHING.

      Reply
    41. Penny says

      March 31, 2026 at 10:10 pm

      Why only email instead of saving the recipes on our data?.

      Reply
      • Erin Clarkson says

        April 01, 2026 at 5:22 pm

        The email emails you a link for future reference. If you hit "print" you can save a copy of it.

        Reply
    42. Marissa says

      April 13, 2026 at 8:36 pm

      This recipe makes the perfect frosting for brownies! I was a little skeptical at first as I was mixing the water in because it looked like it would be too dry. But I told myself to be patient and it did eventually came together. It isn’t too sweet or too buttery, and I also love that it crusts up/hardens a little because it makes it easy to stack the cut brownies in a container. I still put parchment paper in between layers so the bottoms don’t stick, but I like that I don’t have to worry about the frosting smearing off.

      Reply
    Erin Clarkson Cloudy Kitchen

    HI, I'M ERIN

    My recipes range from quick & easy all the way to complex & impressive. I love the science and process of recipe development almost as much as baking itself. I specialize in rigorously tested recipes that are fun, reliable, and accurate.

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