Transform your baking creations with the ultimate frosting experience: Sweetened Condensed Milk Buttercream. This decadent frosting takes everything you love about classic American buttercream and elevates it with an unparalleled richness and silky-smooth texture, thanks to a touch of “liquid gold”—sweetened condensed milk. Say goodbye to overly sweet, one-dimensional frostings and hello to a sophisticated flavor profile that will leave everyone craving more.

If you’re searching for a delightful and distinctive twist on traditional frosting for your cakes and cupcakes, you’ve found your new go-to recipe. Sweetened Condensed Milk Buttercream is incredibly versatile, perfect for effortlessly spreading over elegant layer cakes, piping intricate designs onto cupcakes, or crafting beautiful decorative elements for any special occasion. Its inherent stability and smooth consistency make it a dream to work with, whether you’re a novice baker or a seasoned decorator.
The magic lies in the addition of sweetened condensed milk, which infuses the buttercream with a profound depth of sweetness and a luxuriously creamy mouthfeel that distinguishes it from any other frosting. It’s that subtle, indescribable “something extra” that truly sets your baked goods apart, making them not just delicious, but unforgettable. This unique ingredient enhances the flavor, creating a frosting that is wonderfully rich without being cloyingly sweet, a common complaint with many buttercreams.
Discovering the Secret to the Best Buttercream: A Culinary Quest
For years, my family and I have been enchanted by the exquisite treats from our beloved local bakery, Underbrinks. Their confections possess a certain je ne sais quoi—a mysterious, rich flavor that always made us wonder what their secret ingredient could be. Every bite was an experience, leaving us pondering why our homemade attempts, no matter how earnest, always fell short, missing that elusive “something special” that made Underbrinks’ frosting truly stand out.
I must admit, I rather enjoyed the mystery. There was a certain charm in savoring each bite and relishing the unknown element that made their desserts so uniquely delicious. However, my dear friend MiMi, a passionate baker herself, could not tolerate such a culinary enigma. Her curiosity was insatiable; she absolutely had to uncover the secret!

MiMi embarked on a dedicated quest, experimenting with countless flavorings, extracts, and baking emulsions, striving to achieve that perfect balance. While her creations were undoubtedly good, they never quite matched the distinctive taste and texture of Underbrinks’ frosting. It was a persistent challenge that fueled her determination.
Finally, after politely (I’m sure!) inquiring with a former employee, MiMi believes she has cracked the code. The game-changing ingredient that gives their frosting its unparalleled character is none other than sweetened condensed milk. It truly is a stroke of genius! This “liquid gold,” as we affectionately call it, is renowned for imparting an extra layer of richness and a silky smoothness to baked goods. The thick, delicious can of wonder, often used in pies and bars, had somehow never crossed my mind as a frosting ingredient before. As someone who absolutely adores experimenting with frosting recipes, I was genuinely surprised that this thought had never occurred to me. Inspired by MiMi’s discovery, I immediately set to work developing my own sweetened condensed milk buttercream recipe.

One of Underbrinks’ most celebrated offerings are their iconic upside-down angel food cupcakes—light, airy, and perfectly iced. Naturally, I had to bake a batch of similar cupcakes to generously slather with this newfound frosting. The results were spectacular!
While my version may not be an exact replica of the bakery’s secret recipe, it is undeniably delicious (and that’s what truly matters to me—though I’m eager to hear MiMi’s expert opinion!). The sweetened condensed milk creates an incredibly silky-smooth finish and delivers a delightful, rich flavor that traditional buttercreams often lack. Moreover, it skillfully mellows the sometimes-overpowering sweetness of powdered sugar, resulting in a perfectly balanced and utterly enjoyable frosting.
This particular recipe strikes a wonderful balance; it’s not excessively sweet, yet it offers plenty of delightful flavor. A single batch is sufficient to generously frost a standard 9×13-inch sheet cake or to create beautiful, towering swirls on a dozen cupcakes, ensuring every bite is a delightful experience.
Explore More Sweetened Condensed Milk Frosting Creations
The versatility of sweetened condensed milk in frosting is truly remarkable. Once you discover its magic, you’ll want to incorporate it into all your favorite frosting recipes. Here are some other delightful variations that harness the unique qualities of “liquid gold”:
- Chocolate Sweetened Condensed Milk Frosting: This rich chocolate frosting uses cocoa powder to achieve an intense chocolate flavor while the condensed milk ensures it remains balanced and not overly sweet. It’s a chocolate lover’s dream, perfect for any chocolate cake or cupcake.
- Creamy Caramel Sweetened Condensed Milk Frosting: Indulgently rich and utterly delicious, this caramel frosting is a true showstopper. Its deep, buttery caramel notes pair perfectly with chocolate, banana, or apple cakes, adding a luxurious touch to any dessert.
- Lemon Sweetened Condensed Milk Frosting: Bright, zesty, and incredibly delicious, this lemon-infused frosting is a burst of sunshine. While I adore it on lemon velvet cake, its possibilities are endless—try it on berry cakes, shortcakes, or even as a filling for cookies.

- Super Fudgy Sweetened Condensed Milk Icing: This particular icing is designed as a pour-over rather than a piping frosting. It creates a gloriously fudgy glaze that coats a layer cake with incredible ease and delivers a dense, rich chocolate experience.
- Russian Buttercream: A minimalist yet incredibly rich frosting, Russian buttercream is made with just three ingredients: butter, sweetened condensed milk, and often a touch of vanilla. What sets it apart is the absence of powdered sugar, resulting in a uniquely buttery, super creamy, and intensely smooth frosting that pipes beautifully and has a wonderful melt-in-your-mouth quality.
Expert Tips, Tricks, and Essential FAQs for Perfect Buttercream
Achieving perfect buttercream every time is easier than you think with these expert tips and answers to common questions:
- Yield and Quantity: This recipe is perfectly proportioned to generously frost a single 9×13-inch sheet cake or to create a lovely swirl on a batch of 12-18 standard-sized cupcakes.
- For Layer Cakes and Tall Swirls: If you’re planning to frost a multi-layered cake, or if you prefer to pipe extra-tall, dramatic mounds of frosting on your cupcakes, consider making 1½ batches of this recipe. This will ensure you have more than enough frosting to achieve your desired aesthetic without running short.
- Piping Perfection: This sweetened condensed milk buttercream is exceptional for piping. Its stable yet creamy consistency holds its shape beautifully, making it ideal for everything from simple swirls to more intricate designs. To achieve your desired piping consistency, simply adjust by adding a tiny bit more powdered sugar for a firmer frosting, or a touch more sweetened condensed milk for a slightly softer, creamier texture. Always add small amounts gradually and mix well.

- Crusting for Easy Transport: One of the fantastic benefits of this buttercream is its ability to form a light crust as it sets. This crust provides a protective layer, making your frosted cakes and cupcakes much easier and safer to transport without smudging or damage.
- Vibrant Coloring: This frosting takes color beautifully. For the most vibrant and true-to-shade results, I highly recommend using gel food coloring. Gel colors are concentrated and won’t thin out your frosting, unlike liquid food colorings. Start with a tiny drop and gradually add more until you achieve your desired hue.
- Flavor Exploration: Don’t hesitate to customize the flavor! While vanilla is a classic choice, try adding a hint of almond extract for a delicate nutty note, or a touch of lemon zest and extract for a bright, refreshing twist. Other delicious variations include a hint of coffee extract, a splash of rum, or even a dash of mint extract for seasonal treats.
I am eagerly looking forward to hearing your thoughts on this incredible frosting! Once you’ve had a chance to whip up a batch, please share your experience and any creative twists you’ve added in the comments below. You can also tag me on social media so I can see your beautiful creations!
Optimal Buttercream Storage Practices
Proper storage is crucial for maintaining the freshness and quality of your buttercream. Here’s how to store this sweetened condensed milk buttercream effectively:
- Room Temperature Storage: Thanks to its high sugar content, this buttercream can be safely stored at cool room temperature for up to three days. Ensure it’s kept in an airtight container to prevent it from drying out or absorbing odors.
- Refrigeration for Longer Periods: If you need to store the frosting for a longer duration, it should be refrigerated. Place it in an airtight container and store it in the fridge for up to two weeks.
- Preparation for Best Consistency: I always recommend making frosting fresh right before use to ensure the best consistency and texture for piping and spreading. However, if you’ve refrigerated your buttercream, it will become quite firm. To use it, simply bring it back to room temperature (this can take several hours depending on the amount). Once softened, re-whip it with a stand mixer or hand mixer for a few minutes until it regains its light, fluffy, and creamy texture. You may need to add a tiny splash of milk or extra sweetened condensed milk if it feels too stiff.
- Storing Frosted Cakes: Frosted cakes can also be stored at room temperature, provided none of the cake fillings require refrigeration. Room temperature cakes generally offer the most flavor and the best texture, as the cake layers remain soft and moist.
- Chilling for Transportation: For stress-free transportation of frosted cakes, it’s highly advisable to chill the cake first. Chilling helps the frosting set firmly, making the entire cake more stable and less prone to smudging or damage during transit. Once you reach your destination, allow the cake to slowly return to room temperature before serving to ensure optimal flavor and texture. This simple step can prevent many cake-related transportation mishaps!

Sweetened Condensed Milk Buttercream Frosting
Ingredients
- 1 cup butter softened
- 3 cups powdered sugar
- 1 teaspoon vanilla extract
- 3 to 4 Tablespoons sweetened condensed milk
Instructions
-
Cream softened butter together in a stand mixer fitted with a paddle attachment (or using a hand mixer) until it is smooth and light in color, about 2-3 minutes.1 cup butter
-
Add the vanilla extract and 3 Tablespoons of sweetened condensed milk to the creamed butter. Beat until fully incorporated and smooth, about 1-2 minutes.1 teaspoon vanilla extract, 3 to 4 Tablespoons sweetened condensed milk
-
Gradually add the powdered sugar, one cup at a time, mixing on low speed until each addition is completely incorporated and no dry sugar remains. Scrape down the sides of the bowl as needed.3 cups powdered sugar
-
Once all the powdered sugar is incorporated, increase the mixer speed to high and beat for an additional 2-3 minutes. This step is crucial for whipping air into the frosting, making it light, fluffy, and incredibly smooth.
-
Check the consistency. If the frosting is too thick, add a little more sweetened condensed milk, one teaspoon at a time, until desired creaminess is reached. If it is too thin, add powdered sugar, one tablespoon at a time, until the ideal consistency for spreading or piping is achieved.
-
Use the buttercream immediately for best results. If storing, place in an airtight container in the refrigerator for up to 2 weeks. To use refrigerated frosting, bring it to room temperature and re-whip it slightly with a mixer until it is smooth and fluffy again before applying to your baked goods.
Notes
For a two-layer cake or for very generous piping on cupcakes, consider increasing the recipe by 50% (1½ batches) to ensure ample frosting.
Video Tutorial
Email Me The Link
Enter your email below to receive a direct link to this recipe, so you can easily find it later. Plus, you’ll get exclusive new recipes delivered to your inbox every week!
Nutrition Information
“Cooking With Carlee” is not a dietitian or nutritionist, and any nutritional information shared is an estimate. If calorie count and other nutritional values are important to you, we recommend running the ingredients through whichever online nutritional calculator you prefer. Calories and other nutritional values can vary quite a bit depending on which brands were used.
Did you try this recipe?
Don’t forget to leave a rating below and make sure to follow on Pinterest and Instagram for more delicious inspiration!