Best Egg Yolk Buttercream

If you ask me, egg yolk buttercream is one of those game-changing frosting recipes.

This rich, smooth buttercream takes your cakes and cupcakes to a whole new level of goodness. The egg yolks add a natural yellow color and create the most velvety texture you can imagine.

It’s made using a simple technique that combines heated sugar syrup with whipped egg yolks, then gets mixed with room temperature butter until light and fluffy. The result is less sweet than traditional American buttercream but twice as creamy.

It’s a reliable recipe that works great for layer cakes, and once you try it, you might never go back to regular buttercream again.

What Kind of Egg Yolks Should I Use?

When it comes to making buttercream, fresh eggs at room temperature are your best bet. Large eggs are the standard for baking and will give you the most consistent results – you’ll want to look for eggs with bright, orange-yellow yolks since these tend to create the most beautiful color in your finished buttercream. If you’re separating your eggs, it’s best to do this while they’re still cold from the fridge, but then let the yolks come to room temperature before using them in your buttercream. Just make sure there’s not even a speck of egg white mixed in with your yolks, as this can affect how well your buttercream comes together.

Options for Substitutions

When it comes to this classic French buttercream, some ingredients are essential while others can be tweaked:

• Egg yolks: This is a key ingredient that cannot be substituted – it’s what makes this buttercream special. The recipe needs real egg yolks for the proper texture and richness.
• Butter: Stick with real butter here – margarine or plant-based spreads won’t work as they’ll make the buttercream too soft. However, you can use salted butter instead of unsalted – just skip the added pinch of salt.
• Vanilla extract: Feel free to swap vanilla extract with other flavors like almond extract, coffee extract, or citrus oils. Start with half the amount when using different extracts as they can be stronger than vanilla.
• Granulated sugar: While regular granulated sugar works best, you can use superfine sugar if you have it. Don’t use powdered sugar or brown sugar as they’ll affect the cooking process and final texture.
• Water: Plain water is needed for the sugar syrup – no substitutions here as it affects the chemistry of the recipe.

Watch Out for These Mistakes While Making

The trickiest part of egg yolk buttercream is getting the sugar syrup temperature right – using a candy thermometer is crucial as the syrup needs to reach exactly 240°F (soft-ball stage) for the perfect consistency, and eyeballing it can lead to grainy or runny buttercream.

Another common mistake is adding butter that’s either too cold or too warm – room temperature butter should be soft enough to leave an indent when pressed but still hold its shape, which typically means leaving it out for about 1 hour before starting.

If your buttercream looks curdled or separated during mixing, don’t panic – this is normal and usually means either the mixture is too cold (keep mixing) or too warm (chill for 10-15 minutes, then continue mixing).

For the smoothest results, make sure to whip the egg yolks until they’re very pale and doubled in volume before adding the sugar syrup, and always stream the hot syrup down the side of the bowl rather than directly onto the whisk to prevent sugar crystals from forming.

What to Serve With Egg Yolk Buttercream?

This rich, silky buttercream is perfect for spreading on all sorts of baked treats! It works really well as a filling between layers of vanilla or chocolate cake, and I love how it adds extra richness to simple cupcakes. Since this buttercream has such a smooth, creamy texture, it pairs nicely with fruit-based desserts too – try it with lemon cake or strawberry macarons. If you’re making a dessert table, consider serving some fresh berries or chocolate-covered strawberries alongside your buttercream-frosted treats to balance out the sweetness.

Storage Instructions

Keep Fresh: Your egg yolk buttercream can stay fresh in an airtight container in the fridge for up to 5 days. Before using it on your baked goods, let it come to room temperature and give it a good mix with your electric mixer until it’s smooth and creamy again.

Freeze: If you want to make this buttercream ahead, you can freeze it in an airtight container for up to 3 months. Just remember to press some plastic wrap directly onto the surface of the buttercream to prevent ice crystals from forming.

Bring to Room Temperature: When you’re ready to use your chilled or frozen buttercream, let it thaw in the fridge overnight. Then, leave it on the counter for about 1-2 hours until it reaches room temperature. Beat it with your mixer for a few minutes until it becomes smooth and spreadable again.

Preparation Time	15-20 minutes
Cooking Time	10-20 minutes
Total Time	25-40 minutes
Level of Difficulty	Medium

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 3600-4000
• Protein: 20-25 g
• Fat: 400-450 g
• Carbohydrates: 350-400 g

Ingredients

• 1 pinch salt
• 1 tsp vanilla extract (I use Nielsen-Massey)
• 1/2 cup granulated sugar
• 1 cup butter (softened, 2 sticks)
• 3 tbsp water
• 5 egg yolks (from large eggs)

Step 1: Prepare the Sugar Syrup

In a medium saucepan, combine ½ cup (100 grams) of granulated sugar and 3 tablespoons (45 mL) of water.

Place the saucepan over low heat and stir continually until the sugar completely dissolves.

Once dissolved, increase the heat to medium-high and bring the mixture to a boil.

Step 2: Prepare and Whisk the Egg Yolks

While the sugar mixture is boiling, separate 5 egg yolks from their whites and place the yolks in the bowl of a stand mixer fitted with the whisk attachment.

Whisk the egg yolks on medium speed until they become creamy, lighten in color, and thicken slightly.

Step 3: Combine Sugar Syrup and Egg Yolks

Carefully monitor the sugar syrup until it reaches 240°F (115°C).

Once the desired temperature is reached—or if the syrup begins to overheat—remove it from the heat.

With the mixer running at medium-high speed, slowly drizzle the hot sugar syrup into the egg yolks, ensuring a steady stream to avoid scrambling the yolks.

Continue mixing until the mixture cools to room temperature, which should take about 5 to 15 minutes.

Step 4: Incorporate the Butter

Once the mixture has cooled to room temperature, begin adding 1 cup of room temperature butter, one tablespoon at a time.

Allow each tablespoon of butter to fully incorporate into the mixture before adding the next piece.

Initially, the mixture might look rough and soupy.

Don’t be discouraged—keep mixing until it becomes smooth and silky.

Step 5: Add Flavoring and Achieve Desired Texture

To enhance the flavor, add 1 teaspoon of vanilla extract and a pinch of salt (optional) to the buttercream.

Increase the mixer speed to medium-high and mix for an additional 5 to 6 minutes until the buttercream achieves a silky smooth consistency.

If the mixture appears chunky or has a cottage cheese-like texture, transfer it to a new bowl, and microwave for 20 seconds at half power.

Then, continue mixing until smooth.

Step 6: Prepare for Use

Once the buttercream has reached the perfect smoothness, transfer it into a piping bag.

Your buttercream is now ready to be used for decorating cakes, pastries, or any of your favorite desserts.

Enjoy your delicious, homemade buttercream!