Classic French Buttercream (Crème au Beurre)

A luxurious, velvety French buttercream made from a rich egg-yolk pâte à bombe emulsified with European-style butter. Formulated for a firm, stable set perfect for filling French macarons and frosting celebration cakes.

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Planning

  • Prep Time:

    15 minutes

  • Bake/Cook Time:

    10 minutes

  • Chill/Set Time:

    0 minutes for cake frosting or chill 24 hrs for filled macarons

  • Servings:

    Yield: ~3 cups (Fills ~40–50 macaron shells or frosts an 8-inch, 2-layer cake)

Preparation

  • Materials

    Stand mixer fitted with the wire whisk attachment
    Melting Pot
    Clip-on digital or candy thermometer
    Silicone spatulas
    Mixing Bowls
    Prep Bowls
    Hand whisk

  • Prep

    Measure and weigh all ingredients.

    Cut butter into 1-tablespoon cubes; keep at cool room temperature (65°F–68°F / 18°C–20°C).

    Separate eggs cleanly, placing yolks into the clean, dry stand mixer bowl to come to room temperature (reserve whites for macarons).

    Add granulated sugar to the saucepan, pour boiled water over it, and stir off-heat until sugar is fully dissolved.

    Clip the candy thermometer to the side of the melting pot.

  • Oven/Stove

    Stovetop medium-high heat for boiling sugar syrup.

  • Shopping List

    Granulated Sugar
    Large Eggs
    High-fat Unsalted Butter
    Pure Vanilla Bean Paste or Extract
    Fine Sea Salt

Ingredients

  • Hot Sugar Syrup

    200g Granulated Sugar (1 cup)
    60ml Boiled Water (1/4 cup)

  • Pate a Bombe

    120g Egg Yolks (~6–7 large yolks, room temperature)
    Prepared Hot Sugar Syrup (above)

  • French Buttercream

    340g Unsalted Butter (3 sticks / 1.5 cups / 12 oz), cut into 1-tbsp cubes, cool room temp (65°F–68°F)
    10ml Pure Vanilla Bean Paste or Extract (2 tsp)
    1g Fine Sea Salt (generous pinch)

Steps

  • Hot Sugar Syrup

    STEP 1: In your small heavy saucepan, pour the boiled water over the granulated sugar off-heat. Stir gently until completely dissolved with no loose grains clinging to the pan walls.

    STEP 2: Place over medium-high heat and clip on the candy thermometer (ensuring the sensor is submerged in liquid without touching the bottom of the pot).

    STEP 3: Bring to a rapid boil without stirring. Cook until the syrup reaches the soft-ball stage: 238°F–240°F (115°C–116°C). Remove immediately from heat.

  • Pate a Bombe

    STEP 1 (Whip Yolks to Ribbon Stage): Start the stand mixer on medium-high speed fitted with the whisk beater. Whip yolks for ~3–4 minutes until thick, pale ivory-yellow, and voluminous (they should fall from the lifted beater in a slow, glossy ribbon). Synchronize this so the yolks reach ribbon stage just as the syrup reaches 240°F.

    STEP 2 (Stream Hot Syrup): Reduce mixer speed to low. In a slow, steady, hair-fine stream, pour the hot 240°F syrup between the spinning whisk and the inside edge of the mixer bowl, avoiding getting syrup on the bowl or the whisk.

    STEP 3 (Cool Down): Once all syrup is added, increase speed to medium-high. Whip continuously for 8 to 10 minutes until the mixture transforms into a thick, pale-golden foam and the outside of the mixer bowl feels completely cool to room temperature (68°F–70°F). Never add butter while the bowl is warm.

  • French Buttercream

    STEP 1 (Emulsify the Butter): Reduce mixer speed to medium. Begin adding the cool room-temperature butter one tablespoon piece at a time, allowing each cube to blend into the base before adding the next.

    STEP 2 (Beat to Silk): Continue beating until the mixture smooths out into a thick, glossy, velvety buttercream. (If it briefly looks loose or separated, keep whipping—the natural yolk lecithin will pull the emulsion together).

    STEP 3 (Flavor & Smooth): Add vanilla bean paste and fine sea salt. Whip on medium-high for 1 minute until completely homogeneous.

    STEP 4 (Bakery Secret for Piping): Switch to the paddle attachment and run on the lowest speed ("Stir") for 2 minutes to knock out trapped air bubbles. This creates a silk-smooth, poreless texture ideal for piping macarons.

Notes

FLAVORING
Brandy, espresso, chocolate, berry juice (fresh or extract)Chocolate: melt 1C semisweet in 2 tbsp espresso or brandy.  Cool to room temp and mix in.

COLORING
French buttercream will naturally have a creamy color from the eggs. Keep in mind this will affect the tint of any food color you add. This is usually left natural or a bit of white gel color added to take out the yellow creaminess. Citrus Zest

DECORATING
This buttercream is more creamy and less “frosty”. It is best for large swirls on cakes and cupcakes rather than intricate designs, though it will pipe stars and dollops on top of a cake, around the edges and such. I would not try to pipe shapes on the sides.

PAIRING
Due to the eggy creaminess this pairs well with rich flavors like chocolate, caramel, duce de leche, espresso, butterscotch, and mocha.

SERVING
The frosting is best used immediately when it is most soft and spreadable.
Immediate Use: Ready to pipe directly onto macaron shells, fill delicate sponge cakes, or frost tortes.

MACARON FIRMNESS
This 340g (3-stick) ratio provides structural firmness so macarons can be piped cleanly and will not squish or slide when bitten.

MACARONS: CHILLING & MATURATION
Macarons filled with this buttercream should mature in the refrigerator for 24 hours to develop texture.

STORING
Storage: Store in an airtight container in the refrigerator for up to 1 week, or freeze for up to 2 months. Bring fully to room temperature before re-whipping with a paddle attachment.

TIPS
Wrap frozen towels around mixing bowl when you put it on high.
Keep the butter, pate, and the finished frosting at 68F
Use cool utensils to handle the butter. The warmth from your hands affects the butter immediately.

EQUIPMENT NOTE: MELTING POT & POURING VESSEL
Why Avoid Wide Saucepans: Standard saucepans spread small syrup batches into a shallow layer barely a quarter-inch deep. This leads to intense, concentrated heat over the bottom that easily scorches and overheats the batch, flashes off moisture prematurely, and prevents the thermometer probe from submerging without touching scorching metal (yielding false, elevated readings). Their wide rims and heavy weight also make a controlled, hair-fine pour nearly impossible.

The Ideal Melting Pot: Opt for a small, tall, narrow melting pot, butter warmer, or Turkish coffee warmer (roughly 2.5" to 3.5" in diameter by 5" to 6" tall with a pour spout). The narrow profile forces the liquid upward into a deep column (~3 inches deep), shielding the syrup from direct bottom scorching, regulating heat convection, and fully immersing the thermometer tip for an accurate internal temperature reading.

Effortless Pouring Technique: If your melting pot lacks a flared spout or feels awkward to hold over the bowl, immediately pour the 240°F syrup into a pre-warmed Pyrex or borosilicate glass measuring cup with a sturdy handle. Rest the lip of the pot or measuring cup directly on the upper rim of the stand mixer bowl to anchor your hand. This eliminates arm strain and shaking, allowing you to sustain a slow, hair-fine, hair-width stream directly into the churning yolks without hitting the bowl walls or spinning whisk.

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