Butter frosting is a timeless favorite for cakes, cupcakes, cookies, and more. Its creamy texture and rich, buttery flavor make it a versatile choice for both beginner and experienced bakers. Whether you’re frosting a birthday cake or piping swirls onto cupcakes, this recipe delivers a smooth, spreadable finish that holds its shape and tastes delicious.
Ingredients
- 1 cup (2 sticks) unsalted butter, at room temperature
- 4 cups powdered sugar, sifted
- 2-3 tablespoons whole milk or heavy cream
- 2 teaspoons pure vanilla extract
- 1/8 teaspoon salt
Instructions
- Prepare the butter: Place the room-temperature butter in a large mixing bowl. Using a stand mixer fitted with the paddle attachment or a handheld electric mixer, beat the butter on medium speed for 2-3 minutes until pale, creamy, and smooth. Scrape down the sides of the bowl as needed.
- Add powdered sugar: With the mixer on low speed, gradually add the sifted powdered sugar, 1 cup at a time. After each addition, beat until just combined, scraping the bowl to ensure all sugar is incorporated. This prevents a powdery mess and helps achieve a smooth texture.
- Incorporate liquid and flavoring: Add 2 tablespoons of milk or cream, the vanilla extract, and the salt. Beat on low to combine, then increase to medium-high and whip for 3-4 minutes until the frosting is light, fluffy, and spreadable. If the frosting seems too thick, add up to 1 more tablespoon of milk, a teaspoon at a time, until desired consistency is reached.
- Check consistency: The frosting should be soft enough to spread easily but stiff enough to hold its shape for piping. If it’s too loose, add a little more powdered sugar (1-2 tablespoons at a time). If too stiff, add a splash more milk.
- Use or store: Frost cakes, cupcakes, or cookies immediately, or keep covered until ready to use. If storing for later, see storage instructions below.
Tips
- Butter temperature: Use butter that is soft but not melted. Too cold and it won’t cream properly; too warm and the frosting may be greasy or runny.
- Sifting sugar: Sift powdered sugar before adding to avoid lumps and ensure a silky-smooth frosting.
- Flavor variations: Swap vanilla for almond, lemon, or maple extract for a different twist. Add a pinch of cinnamon for warmth.
- Coloring: For colored frosting, add gel food coloring after the frosting is whipped. Mix thoroughly for even color.
Serving Suggestions
- Classic cakes: Spread generously over layer cakes like vanilla, chocolate, red velvet, or carrot cake.
- Cupcakes: Pipe tall swirls using a pastry bag fitted with a star tip for bakery-style cupcakes.
- Sugar cookies: Use as a soft icing for cookies; let set at room temperature for a slight crust.
- Brownies and bars: Top brownies or dessert bars for an extra layer of sweetness and creaminess.
- Sandwich: Pipe between two cookies for homemade sandwich cookies.
Variations
- Chocolate butter frosting: Add 1/2 cup unsweetened cocoa powder with the powdered sugar. Increase milk by 1-2 tablespoons if needed.
- Lemon butter frosting: Replace 1 tablespoon of milk with fresh lemon juice and add 1 tablespoon finely grated lemon zest. Use lemon extract instead of vanilla for extra zing.
- Strawberry butter frosting: Beat in 1/4 cup freeze-dried strawberry powder or 2 tablespoons strawberry puree (reduce milk slightly).
- Salted caramel butter frosting: Add 1/3 cup cooled caramel sauce after beating in the sugar. Reduce milk to prevent thinning.
- Dairy-free option: Substitute vegan butter and plant-based milk for a dairy-free version. Results may be slightly softer but still delicious.
Storage and Reheating
Room temperature: Butter frosting can be kept at cool room temperature (below 70°F/21°C) for up to 2 days. Cover with plastic wrap or transfer to an airtight container to prevent drying out or absorbing odors.
Refrigerator: For longer storage, refrigerate frosting in an airtight container for up to 1 week. Before using, let it come to room temperature for 30-60 minutes, then re-whip briefly to restore creaminess.
Freezer: For make-ahead convenience, freeze butter frosting for up to 3 months. Place in a freezer-safe, airtight container. Thaw overnight in the refrigerator, then let sit at room temperature until soft. Re-whip with a mixer to regain its smooth, fluffy texture.
Reheating: Butter frosting should not be microwaved, as it can melt and separate. Always bring to room temperature and beat gently to refresh texture if it has stiffened during storage.
Frequently Asked Questions
- Can I use salted butter instead of unsalted?
- Yes, you can use salted butter if that’s what you have on hand. Reduce or omit the added salt in the recipe to avoid an overly salty frosting. Unsalted butter gives you more control over the final flavor, but both will work.
- Why is my butter frosting grainy or lumpy?
- Grainy frosting is usually caused by unsifted powdered sugar or butter that is too cold. Always sift your sugar and make sure your butter is at room temperature before starting. Beat the frosting thoroughly to dissolve any sugar bits.
- How do I fix runny or too-thin frosting?
- If your frosting is too loose, add more powdered sugar, 1-2 tablespoons at a time, until it thickens. Also, check that your butter wasn’t too warm when you started. If necessary, chill the frosting for 10-15 minutes before using.
- Can I make butter frosting in advance?
- Yes, butter frosting can be made ahead and stored in the refrigerator for up to a week or frozen for up to three months. Let it come fully to room temperature, then re-whip before spreading or piping for the best texture.
- Is butter frosting safe to leave out at room temperature?
- Butter frosting is safe at room temperature for up to 2 days if your kitchen is cool (below 70°F/21°C). In warmer environments, it’s best to refrigerate it to prevent melting or spoilage. Always cover to keep it fresh.
- Can I use this recipe under fondant?
- Yes, this butter frosting works well as a crumb coat or base layer under fondant. Chill the frosted cake first to set the frosting, which helps the fondant stick and creates a smooth finish.
- How much frosting does this recipe make?
- This recipe yields enough to generously frost a two-layer 8- or 9-inch cake, or about 24 cupcakes. If you plan to pipe tall swirls or decorate a large cake, consider doubling the recipe.