This easy 2 ingredient frosting recipe is perfect for anyone who wants to whip up a creamy, delicious topping in minutes—without a long ingredient list or special equipment. With just two pantry staples, you’ll have a smooth, spreadable frosting that’s ideal for cakes, cupcakes, cookies, and more. Whether you’re baking on a whim or need a reliable last-minute option, this recipe delivers sweetness and convenience every time.
Ingredients
- 1 cup (230g) unsalted butter, at room temperature
- 2 cups (240g) powdered sugar (confectioners’ sugar), sifted
Instructions
- Prepare the butter: Place the room temperature butter in a large mixing bowl. If your butter is still cold, cut it into cubes and let it sit at room temperature for 30–45 minutes until softened but not melted.
- Cream the butter: Using an electric hand mixer or a stand mixer fitted with the paddle attachment, beat the butter on medium speed for 2–3 minutes. The butter should become pale, light, and creamy.
- Add powdered sugar: Gradually add the sifted powdered sugar, about 1/2 cup at a time. Mix on low speed after each addition to prevent sugar clouds, then increase to medium speed. Scrape down the sides of the bowl as needed.
- Beat until fluffy: Once all the sugar is incorporated, beat the frosting on medium-high speed for another 2–3 minutes, until it is smooth, fluffy, and easily spreadable. If the frosting is too thick, add 1–2 teaspoons of milk (optional, not included in the ingredient count) to loosen it slightly.
- Use or store: Use immediately to frost your cake, cupcakes, or cookies. If not using right away, cover and store as directed below.
Tips
- Butter temperature matters: Make sure your butter is truly at room temperature. Too cold and it won’t blend smoothly; too warm and the frosting will be greasy.
- Powdered sugar substitutions: For best results, use real powdered (confectioners’) sugar. In a pinch, you can make your own by blending granulated sugar with cornstarch until very fine, but the texture may not be quite as smooth.
- Flavor options: Add a pinch of salt or a teaspoon of vanilla extract for extra flavor if desired. These are optional and do not count toward the 2 ingredients.
- Storage: Keep the frosting covered to prevent it from drying out or absorbing fridge odors. If it gets too firm in the fridge, let it soften at room temperature and re-whip before using.
Serving Suggestions
- Classic cupcakes: Pipe or spread the frosting onto cooled cupcakes for a simple, sweet finish. Decorate with sprinkles or colored sugar for extra flair.
- Layer cakes: Use between cake layers and over the top for a smooth, classic finish. This recipe yields enough for a two-layer 8-inch cake or 12 cupcakes.
- Cookies: Sandwich between two cookies or swirl on top of sugar cookies for instant bakery-style treats.
- Sheet cakes and bars: Spread generously over brownies, blondies, or sheet cakes for a quick upgrade.
Variations
- Chocolate frosting: Replace 1/4 cup of the powdered sugar with unsweetened cocoa powder for a classic chocolate version. Sift the cocoa powder with the sugar before adding.
- Citrus twist: Add 1–2 teaspoons of finely grated lemon or orange zest for a bright, zesty flavor (optional extra ingredient).
- Nutty version: Substitute half of the butter with creamy peanut butter for a rich, nutty frosting. This works especially well on chocolate or banana cakes.
- Vegan alternative: Use vegan butter in place of dairy butter. Choose a brand that is suitable for baking and at room temperature for best results.
- Spiced frosting: For a fall-inspired treat, add 1/2 teaspoon ground cinnamon or pumpkin pie spice to the powdered sugar before mixing.
Storage and Reheating
This 2 ingredient frosting stores well and can be made ahead:
- Refrigerator: Place the frosting in an airtight container and refrigerate for up to 5 days. Before using, let it sit at room temperature for 30–60 minutes, then re-whip with a mixer to restore its creamy texture.
- Freezer: You can freeze the frosting for up to 1 month. Thaw overnight in the refrigerator, then bring to room temperature and beat again until smooth.
- Do not microwave: Avoid reheating in the microwave, as this can melt the butter and cause the frosting to separate. Always let it soften naturally at room temperature before re-whipping.
Frequently Asked Questions
- Can I use salted butter instead of unsalted?
- Yes, you can use salted butter in this recipe. Just omit any additional salt you might otherwise add. The frosting will have a slight salty note, which some people enjoy as it balances the sweetness. If you prefer more control over the salt level, stick with unsalted butter.
- Is powdered sugar the same as icing sugar or confectioners’ sugar?
- Yes, powdered sugar, icing sugar, and confectioners’ sugar are different names for the same finely ground sugar mixed with a small amount of cornstarch to prevent clumping. In most countries, these terms are interchangeable for baking purposes.
- My frosting is too stiff. How can I fix it?
- If your frosting is too thick or stiff to spread, add a teaspoon of milk or cream and beat again until it reaches your desired consistency. Add liquid gradually—a little goes a long way. If you want to keep the recipe strictly 2 ingredients, simply whip the butter for a bit longer; the heat from mixing can also help soften it slightly.
- My frosting is too runny. What should I do?
- If the frosting is too soft or runny, check that your butter wasn’t too warm or melted to start. If so, refrigerate the bowl for 10–15 minutes, then whip again. You can also add a bit more powdered sugar to thicken it, but do so gradually to avoid making it too sweet.
- Can I pipe this frosting onto cupcakes?
- Absolutely! This frosting is sturdy enough for piping simple swirls and designs. For best results, use a large piping tip and make sure the frosting is cool but not too firm. If the frosting gets too soft while piping, chill it briefly and then continue.
- Does this frosting crust or harden?
- This 2 ingredient buttercream will form a very light crust on the surface if left uncovered, but it remains soft and creamy underneath. It’s not as hard as royal icing or glaze, so it’s best for cakes and cupcakes that will be consumed within a few days.
With just butter and powdered sugar, this easy 2 ingredient frosting is a go-to for no-fuss baking and decorating. Its simplicity, versatility, and classic flavor make it a reliable choice for both beginners and experienced bakers. Try it on your next batch of cupcakes, sandwich cookies, or layered cakes—and enjoy a sweet, creamy finish every time!