Give your next batch of brownies an instant upgrade with this easy brownie frosting! It's thick, fudgy, and rich, making it the best chocolate frosting for brownies!
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Why I Love This Chocolate Frosting for Brownies
- It's easy: Yes, we are all about the easy here, and this chocolate frosting is simple as can be. If you can make a boxed brownie mix, you can make this brownie frosting recipe.
- It's delicious on boxed brownie mix or homemade: Speaking of boxed brownie mix! This frosting also gives any boxed mix an upgrade (Ghirardelli triple chocolate brownie mix is my personal fave!), but it's also perfect with your favorite homemade brownie recipe. You can even use it on my homemade cosmic brownies!
- It's rich & delicious. So. Good. This brownie frosting is way better than canned store-bought, with a supremely fudgy texture and rich chocolate flavor.
Tips & Ingredient Notes
This is just an overview, click here to jump down to the full recipe card for the recipe amounts and condensed recipe instructions.
- Unsweetened cocoa powder: I use Hershey's cocoa powder, which will give you that classic chocolate flavor. Just be sure not to use hot cocoa mix, which is something entirely different!
- Butter: I like using unsalted butter for this recipe. This helps you control the level of salt, and therefore the flavor of the brownie icing.
- Powdered sugar: no substitutions can be made here, as we need the fluffy powdered sugar to make the buttercream.
- Vanilla Extract: enriches the flavor but can be omitted in a pinch
- Salt: this enhances the chocolate flavor and helps tone down the sweetness of the powdered sugar
- Milk: we use milk in this recipe to help thin it out; you can use any type of milk or cream
Flavoring Ideas for This Brownie Icing Recipe
Want to add some flavor to your brownie topping? Try these ideas.
- Peanut butter: Add 3 tablespoons of peanut butter. You can also top this peanut butter frosting for brownies with Reese's pieces or chopped peanut butter cups!
- Mint: Add ½ teaspoon of peppermint extract. Top this mint frosting for brownies with crushed peppermint candies!
- Coffee: add 1 teaspoon of espresso powder or substitute the milk for cooled liquid espresso
- Cosmic Brownies: Use this frosting on my homemade cosmic brownies or just use it on a batch of boxes of brownies with rainbow chip sprinkles!
How to Make Chocolate Buttercream Frosting for Brownies:
- Beat ½ cup of softened unsalted butter, 2 teaspoons of vanilla extract, and ¼ teaspoon of salt in a microwave-safe mixing bowl until the mixture is smooth and creamy.
- Reduce the mixer speed to low, then slowly add ½ cup of cocoa powder and 2 cups of powdered sugar.
- Stop to scrape down the sides if needed, then add 2 tablespoons of milk and beat on high for a minute or two. At this point, you can add another tablespoon of milk to make it thinner, more powdered sugar to thicken it up, or move onto the next step.
- Heat the frosting in the microwave for 15 to 30 seconds, then stir until smooth.
- Spread it onto a 9x13 pan of brownies.
Tip: Microwaving this fudge frosting for brownies makes it glossier and easy to spread!
Storage & Freezing
Storing: You can cover the bowl (press the plastic wrap directly onto the frosting) and store this brownie frosting in the fridge for up to a week. You'll need to warm it up in the microwave again & stir it before you use it.
Freezing: Chocolate frosting for brownies can be transferred to a freezer bag or airtight storage container and frozen for up to 2 months. Let it thaw in the refrigerator, then heat it in the microwave before frosting your brownies. You may need to add a splash of milk or whip it in the mixer to help it come back together.
Frequently Asked Questions:
The high sugar ratio in buttercreams like this makes the milk & butter shelf stable for 1-2 days. If it makes you feel better, store your frosted brownies in the fridge or wait to frost until closer to serving.
You do need some kind of powdered sweetener to make chocolate icing for brownies. If you can't eat sugar, or you're avoiding it, you can try a powdered sugar substitute like Swerve instead (I haven't tested it myself).
This frosting is nice & thick and will firm up in the refrigerator. Although the sugar to milk ratio makes the frosting shelf stable for a few days, store your frosted brownies in the fridge for peace of mind.
You should let your brownies cool completely before you frost them. This keeps the frosting from getting greasy and it prevents the brownies from getting crumbs in the frosting.
The Best Chocolate Frosting for Brownies
Ingredients
- ½ cup unsalted butter (1 stick) softened to room temperature or microwaved for 10 seconds
- 2 teaspoons vanilla extract
- ¼ teaspoon salt
- ½ cup unsweetened cocoa powder I use Hershey's brand
- 2 cups powdered sugar
- 2-3 tablespoons milk (you can add more to reach desired consistency)
Before you begin! If you make this, will you do me a huge favor and leave a review and rating letting me know how you liked this recipe? This helps my small business thrive so I can continue providing free recipes and high-quality content for you.
Instructions
- In a microwave-safe mixing bowl, beat the softened unsalted butter (½ cup, i.e. 1 stick), vanilla extract (2 teaspoons), and salt (¼ teaspoon) on medium-high speed for 1 minute until smooth. Turn the mixer to low speed then slowly add the unsweetened cocoa powder (½ cup) and powdered sugar (2 cups). You may need to stop and scrape down the sides. Add 2 tablespoons of milk.
- Beat on high for 1-2 minutes until creamy and the frosting is at a good consistency to pipe. If it looks too runny, add more powdered sugar. If it looks too stiff, add another 1-2 tablespoons of milk until you get to the desired consistency.
- Place the mixing bowl in the microwave and heat for 15 to 30 seconds, or until glossy, easy to stir and smooth.
- Spread the frosting onto a 9x13 pan of brownies.
- Although the sugar to milk ratio makes the frosting shelf stable for 1-2 days, you may want to store your frosted brownies in the fridge for peace of mind.
Last Step! Please leave a review and rating letting me know how you liked this recipe! This helps my small business thrive so I can continue providing free recipes and high-quality content for you.
Fantastic frosting easy to make and delicious. This is the second time I’ve made it. This time instead of using milk I used Irish cream, coffee creamer as a friend just got back from Ireland and we were having a party to celebrate and hear about her trip. I use this to frost brownies. Turned out fantastic!!!
I am so glad to hear you enjoy this recipe so much, Denise! Thank you so much for leaving a review!
I haven't tasted it yet but it's easy to follow .All ingredients were in my house so I love it .thank you
This recipe is excellent and so very easy. I baked my brownies in a 9x9" dish and only used half the recipe. It was plenty for that size. Thank you Melissa!
Thank you so much for leaving a review, Millie! So glad to hear you enjoyed it so much!
Wow!
LOL! My favorite kinda comment! Thanks so much for taking time to leave a review, Elaine:)
Hello! Perfect frosting for my Hershey's Cocoa brownies. Very easy too! Tastes delicious on my fingers and off the utensils! I'm waiting for it to set up on them, so dessert after dinner. Thank you so much for posting this recipe. I'll keep it with the brownie recipe!
I'm so happy you enjoyed the brownie frosting, Peter! Thank you for taking time to leave a review!
This recipe for frosting worked great! I loved learning the technique of microwaving the icing for a short while. It spread like a dream. Exquisite!!
I'm so glad the Easy Brownie Frosting recipe was helpful, Kathi! Thanks so much for taking time to leave a review! I appreciate it!
It is SO YUMMY! THANKS FOR THE RECIPE!!
I'm so happy you enjoyed the Easy Brownie Frosting recipe, Jill! Thanks so much for leaving a review!
The best frosting I have ever had for my brownies after many many years. Thank you so much for sharing
I'm so glad you loved the Easy Brownie Frosting recipe, Nancy! Thanks so much for taking time to leave a review!
I made this recipe for my brownies and it is absolutely delicious and so easy to make and I make the 48 servings portion because I love a lot of frosting on my brownies and I tubbed up the extra. I also stored my frosted brownies in the freezer and when I wanted one I just took one out of the freezer and I love them being frozen. I recommend this recipe to anyone who is looking for a quick and easy brownie frosting recipe!!!!
I'm so glad you enjoyed the brownie frosting recipe, Stephanie! Thanks so much for taking time to leave a review!
So easy and uses ingredients I have on hand. Used it to dress up a box mix brownie to take to an event. Made something ordinary really special.
I'm so glad you enjoyed the brownie frosting recipe, Dianne! Thanks so much for taking time to leave a review!
I came across this recipe and decided to try it to top a box mix that my daughter made. It was simple to make and makes the box brownies so much better. I cut the recipe in half and it was the perfect amount for a 9×9 pan. Thanks for sharing.
I'm so glad you enjoyed the brownie frosting, Bill! Thanks so much for taking time to leave a review!
A very nice frosting taste great a good alternative for those of us who doesn't like cream cheese
I'm so glad you enjoyed the Easy Brownie Frosting recipe, Becky! Thanks for taking time to leave a review!
Thanks this was perfect. My pan my of brownies was unlevel. Adding the frosting saved the day. It was easy and delicious.
I'm so glad the frosting saved the day, Cheryl! Thanks so much for taking time to leave a review!
Woah! This is the best frosting I've ever made - it's beyond easy to use and spreads beautifully on the brownies!
Yay! Thank you so much for leaving a review, Ellie! I really appreciate it!
This is a great tasting frosting and so easy to make. I will definitely use it again.
Thank you so much for leaving a review, Anita!
Good recipe! I ended up adding 1/4 cup of extra butter. 1/2 stick butter with 2 & 1/2 cups of dry powdered stuff seemed way too dry and stiff to me. It helped a lot. I still ended up adding 4 tbls milk to thin it out to the right consistency for me. I will use this again!!
So happy to hear you enjoyed this recipe, Karin! Thank you so much for leaving a review!
Thank you an easy, and OMG delicious recipe! I reallly like how you listed in parentheses how much of each ingredient to add. It saves a ton of time by not scrolling up and down to get the amount and finding your place again. I needed a good recipe for box mix brownies and this was it! Definitely pinning this one future enjoyment!
So happy to hear you enjoyed this recipe, Rhonda! Thank you so much for leaving a review, I really appreciate it!