Not Too Sweet Buttercream Frosting Recipe

This buttercream tastes like vanilla and butter rather than pure sugar because it keeps the ratio at 1:1 butter to powdered sugar, half the sugar of standard American buttercream.

You will need about an hour to bring the butter to 65–75°F before the 20 minutes of active beating begins, and that slow warm-up is the step that trips most people up.

Too cold and the frosting breaks; too warm and it turns soupy.

Not-Too-Sweet Buttercream Frosting

Standard American buttercream usually piles on twice the sugar to butter, which is why so many cakes taste like nothing but sweetness.

This version keeps the ratio at 1:1 butter to powdered sugar, enough structure to pipe a clean rose but low enough in sugar that vanilla and salt come through. The result is frosting that actually tastes like something.

I reach for this recipe when I need a layer cake or cupcakes to carry real flavor. If the cake itself is already sweet, a less sugary buttercream balances the bite rather than compounding it.

Room temperature butter is the make-or-break detail here.

Buttercream pipes best at 65–75°F, cool enough that it still holds shape but soft enough to whip airy. Too cold and the frosting breaks; too warm and it turns soupy before it ever reaches the cake.

I cut the butter into tablespoon slices and let it sit on the counter for about an hour, which for most kitchens lands right in that range.

A single batch yields enough to frost a two-layer 8-inch cake or 24 cupcakes.

Active time runs about 20 minutes, plus that hour of waiting for butter to soften. The long beating, 12 to 15 minutes on medium speed, is what builds the silky texture.

Ingredients

Not too sweet buttercream frosting starts with restraint. Each ingredient pulls weight, and the small list keeps the flavor clean.

• 1 cup unsalted butter (2 sticks), 65–75°F. Room-temperature butter creams properly and carries the richness. Unsalted lets me set the salt level myself; brands vary too much otherwise.
• 1 cup powdered sugar, sifted. This is half what most American buttercreams call for. The frosting still needs sugar for structure and a slight crust, but the drop keeps it from cloying.
• 2–3 tablespoons heavy cream, at least 35% fat. The fat percentage matters; lower-fat dairy will break the emulsion.
• 1 teaspoon good-quality vanilla extract. Madagascar bourbon is my standard, though Mexican vanilla works if you want something darker.
• 1/4 teaspoon fine sea salt. The salt does not make it salty; it makes the sweetness taste like something instead of just sweet.

Milk Street’s version uses far more cream to build an emulsion, and the principle holds here too: forcing water-based cream into fat-based butter creates stability and air.

"A cup of heavy cream may seem like a lot, but it’s the key to this frosting’s supple, cloud-like texture and sweet, but not cloying, flavor."

— Milk Street

Even with less cream than Milk Street’s ratio, drizzling it in slowly while beating preserves that same light structure.

Method

1. Pull the butter out early and let it sit until it hits 65–75°F, cool to the touch but soft enough to dent with a finger. Sift the powdered sugar so you do not end up with tiny lumps in the finished frosting.
2. Beat the butter 5–10 minutes until it turns noticeably lighter in color, almost off-white, and the texture looks fluffy rather than waxy. Use the paddle if you want fewer air bubbles, though it will take longer; the whisk is faster but adds more volume.
3. Add the powdered sugar and salt in increments, a spoonful at a time, with the mixer on low. Scrape the bowl bottom and sides between additions so no butter hides in the corners.
4. Pour in the heavy cream and vanilla slowly while the mixer runs on low speed. This lets the liquid emulsify into the butter instead of splattering or breaking the mixture.
5. Turn the speed up and whip 5–15 minutes. The buttercream should look thick, silky, and pale, holding a peak that bends slightly at the tip.
6. Judge the consistency and adjust. If it feels stiff or resists spreading, beat in more cream a teaspoon at a time. If it droops or will not hold shape, work in more sifted sugar.

Yield and Timing

This batch yields about 2 cups of frosting, enough for 12 cupcakes or a thin layer over a 9-inch two-layer cake. Total active time runs 15 to 25 minutes, mostly beating.

The longer you run the mixer, the more air you work in. A full 15 minutes of whipping produces the fluffiest, lightest texture, though I find 5 minutes perfectly adequate when I want a smoother, denser finish that holds sharper edges.

Either way works; the difference is mostly about what you are frosting. Cupcakes and casual layer cakes benefit from that extra volume, while a cake you plan to smooth-scrape for decorating steadies down with the shorter beat.

Storage

An airtight container in the refrigerator keeps this buttercream good for up to one month. Let it sit out until it reaches room temperature, then re-whip before you spread or pipe.

Cold storage can stress the emulsion. If the frosting separates or curdles after chilling, beat it on medium-high for 2 to 3 minutes.

Still broken? Warm a small portion in the microwave for 10 seconds, beat that back in, and the rest usually smooths out.

This less-sweet formula is slightly less stable in heat than traditional American buttercream. For outdoor summer events, I would add 2 tablespoons shortening or keep the cake chilled until serving time.

Substitutions and Variations

Vegan butter sticks swap in cleanly for dairy butter, though the finish is slightly less rich.

For a chocolate version, add 1/4 cup cocoa powder sifted with the sugar, or beat in 2 ounces of cooled melted chocolate after the cream; both deepen the flavor but also heighten sweetness perception, so pull back the sugar by 2 tablespoons.

Almond, lemon, or coffee extracts substitute one to one for vanilla. A half vanilla bean, seeds scraped, replaces the extract with more layered flavor if you want to push past the standard.

What Goes Wrong and How to Fix It

Curdled buttercream almost always means the butter was too cold, below 65°F. The mixture looks broken and grainy, but keep beating for 3 to 5 minutes and it usually comes together.

If your kitchen is chilly, warming the bowl slightly with clean hands pressed against the metal helps move things along.

Gritty texture is a different problem.

The sugar was not sifted, and once the frosting is made, there is no fixing it. Sift before you measure next time.

If the batch turns out too soft to hold a piped rosette, 15 minutes in the refrigerator firms the butter enough to re-whip to shape. Two extra tablespoons of sugar will also stiffen it, though that edges the sweetness up slightly.

Too stiff to spread across a cake layer needs the opposite move: cream, one teaspoon at a time, beaten in fully before you judge whether it needs another.

Greasy separation after chilling is normal for this formula.

The butter firms in the cold and the emulsion breaks. A quick re-whip restores the silky texture you started with.

Frequently Asked Questions