This buttercream frosting is the one I reach for every single time a cake or a batch of cupcakes needs topping. It only takes four pantry staples and about ten minutes at the mixer, and you end up with a frosting that's fluffy, spreadable, and just sweet enough without tipping into cloying territory. It holds its shape beautifully every time and is endlessly adaptable for any occasion.
1cupunsalted butter227g, softened to room temperature
4cupspowdered sugar480g, sifted
2teaspoonspure vanilla extract10ml
1/8teaspoonsalt0.75g
2 to 4tablespoonsheavy cream or whole milk30-60ml
Instructions
Place the softened unsalted butter in the bowl of your stand mixer fitted with the paddle attachment. Beat on medium speed for 3 to 4 minutes, scraping down the sides once or twice, until the butter turns noticeably paler and looks smooth and creamy.
Turn the mixer to the lowest speed. Add the salt along with 2 cups of the sifted powdered sugar. Mix on low until fully incorporated and no dry streaks remain, about 1 minute. Scrape down the bowl again.
Pour in the vanilla extract along with the remaining 2 cups of powdered sugar. Mix on low until combined, then add 2 tablespoons of the heavy cream or milk. Continue mixing on low until the frosting comes together and no longer looks powdery.
Increase the mixer speed to medium-high and beat for 2 to 3 minutes, until the frosting lightens in color and noticeably increases in volume. Adjust consistency with remaining cream or extra powdered sugar as needed.
Spread the frosting directly onto fully cooled cakes or cupcakes with an offset spatula, or transfer to a piping bag fitted with your tip of choice. If too soft to pipe clean lines, chill for 10 to 15 minutes, then re-whip briefly before piping.
Notes
Always start with truly room temperature butter, not butter that's still cold in the center.
Sift the powdered sugar to avoid lumps and a gritty texture.
Add liquid gradually, since it's much easier to thin frosting out than to thicken it back up.
Whip on medium-high speed at the end to incorporate air and lighten the texture.
If your kitchen is warm, chill the frosting briefly before piping detailed designs.
Taste as you go and adjust salt or vanilla to your preference.
Store in an airtight container at room temperature for up to 2 days, in the refrigerator for up to 1 week, or in the freezer for up to 3 months.
Before using refrigerated or frozen frosting, let it sit at room temperature until fully softened, then re-whip for 1 to 2 minutes to restore the light, fluffy texture.
For chocolate buttercream, add 1/2 cup unsweetened cocoa powder along with the powdered sugar.
For strawberry buttercream, fold in 3 tablespoons of freeze-dried strawberry powder at the end.
For lemon buttercream, replace the vanilla with lemon extract and add 1 teaspoon lemon zest.
For cream cheese frosting, replace half the butter with softened cream cheese for a tangier finish.