Easy 2-Ingredient Russian Buttercream (Condensed Milk Frosting)

If you love the silky smooth texture of a Swiss or Italian Buttercream but hate the hassle of boiling sugar syrups and whipping egg whites, this recipe is about to change your life. Russian Buttercream, also known as Condensed Milk Buttercream, is incredibly light, airy, and pipes like an absolute dream. The best part? It only requires two main ingredients and takes less than 10 minutes to whip up.

What is it

Russian Buttercream is a surprisingly simple frosting made by extensively whipping softened butter and then slowly emulsifying it with sweetened condensed milk. Unlike a gritty American Buttercream that relies on heaps of raw powdered sugar for structure and sweetness, Russian Buttercream utilizes the pre-cooked sugars and concentrated dairy found in the canned milk. This creates a completely grit-free, luxurious texture with a distinctly rich, milky, and slightly caramel-like flavor. While it doesn’t have the intense stability of a meringue-based professional frosting in extreme heat, it is stable enough for most indoor celebrations and detailed piping work.

Why you’ll love it

• Only Two Ingredients: You literally only need butter and a can of sweetened condensed milk to make the base recipe.
• No Thermometers Required: There is no need to boil sugar to precise temperatures or temper raw eggs.
• Silky Smooth Texture: Because the sugar in the condensed milk is already dissolved and cooked, the final frosting is 100% smooth and never gritty.
• Not Overly Sweet: It has a pleasant, creamy sweetness that pairs beautifully with a classic Vanilla Sponge Base or a rich Chocolate Cake Without Oven.

Ingredients

Temperature is the single most important factor when making this recipe. Ensure your ingredients are perfectly prepared before you start!

• 2 cups (4 sticks / 454g) Unsalted Butter: This MUST be at a cool room temperature (about 65-68°F or 18°C). You should be able to make a slight indent with your finger, but the butter should not be greasy or melting.
• 1 can (14 oz / 396g) Sweetened Condensed Milk: This should also be at room temperature or slightly chilled, but never warm.
• 1 tsp Vanilla Extract: To enhance the flavor.
• ¼ to ½ tsp Fine Sea Salt: Highly recommended to balance the sweetness of the condensed milk.

How to make

Patience during the first step is the secret to a fluffy Russian Buttercream.

1. Whip the Butter: Place your cool, room-temperature butter into the bowl of a stand mixer fitted with the whisk attachment (or use a hand mixer). Whip the butter on high speed for a full 5 to 8 minutes. It should become very pale, almost white, and double in volume. Stop and scrape down the sides of the bowl a few times during this process.
2. Add the Milk Slowly: Turn the mixer speed down to medium. Begin pouring the sweetened condensed milk into the whipped butter in a slow, steady stream (or in three small batches).
3. Emulsify: Once all the condensed milk is added, turn the mixer back up to high speed and whip for another 1 to 2 minutes until the mixture is completely smooth, thick, and silky.
4. Flavor: Add the vanilla extract and salt. Whip for a final 30 seconds to distribute the flavors.

How To Serve

Russian Buttercream is incredibly versatile and takes on food coloring beautifully. Use a piping bag fitted with a star tip to pipe elegant swirls onto cupcakes, or use an offset spatula to frost a layer cake. Because of its unique, milky flavor profile, it pairs phenomenally well with coffee or fruit flavors. Try using it as a filling for a Red Velvet Swiss Roll or swirling it on top of fresh Strawberry Cupcakes. For a twist, you can even use Dulce de Leche instead of plain condensed milk for a rich caramel frosting!

How To Store

• Room Temperature: Russian Buttercream is safe at a cool room temperature for up to 2 days. However, because it is softer than meringue buttercreams, do not leave it in direct sunlight or in a hot kitchen, as the butter will melt and separate.
• Refrigerator: Store leftover frosting in an airtight container in the fridge for up to 1 week. It will harden significantly. Let it sit on the counter for a few hours to reach room temperature, then re-whip it with your mixer until smooth before using.
• Freezer: You can freeze this frosting for up to 2 months in a tightly sealed container. Thaw overnight in the fridge, bring to room temperature, and vigorously re-whip.

FAQs

Why did my buttercream separate and look curdled?

This happens if your condensed milk was too cold or if you poured it in too quickly, overwhelming the butter. To fix it, you can take 1/4 cup of the curdled mixture, microwave it for 10 seconds until melted, and pour it slowly back into the running mixer to help re-emulsify the fats.

Why is my frosting runny and soup-like?

If your frosting is liquid, your butter was too warm (melting) when you started, or your kitchen is too hot. Place the entire mixing bowl in the refrigerator for 15-20 minutes to chill the fats, then put it back on the mixer and whip until fluffy.

Can I make this with evaporated milk instead?

No! You cannot substitute evaporated milk. Evaporated milk is unsweetened and very watery. Sweetened condensed milk is thick, syrupy, and contains the exact sugar ratio needed to give this frosting its structure and taste.

Note

Do not skip whipping the butter for the full 5-8 minutes at the very beginning. The butter needs to aerate and build structure so it can hold the heavy condensed milk without collapsing or separating.

Nutrition information

(Estimates based on 2 tablespoons of frosting)

• Calories: 145 kcal
• Carbohydrates: 8 g
• Sugars: 8 g
• Protein: 1 g
• Fat: 12 g

Tips and Tricks

• The Finger Test: To ensure your butter is the perfect temperature, press it with your finger. It should leave an indent but still feel cool to the touch. If it feels greasy or your finger slides right through, it is too warm and will result in a soupy frosting.
• Scrape the Bowl: Butter loves to hide at the very bottom of the mixing bowl. Always stop your mixer and scrape the bottom and sides thoroughly with a silicone spatula before adding the milk.
• Flavor Variations: This frosting is a great blank canvas! You can beat in a few tablespoons of sifted cocoa powder, a shot of strong espresso, or freeze-dried strawberry powder at the very end to customize the flavor.