Ptichye Moloko (Russian Bird’s Milk Cake Recipe)

Ptichye Moloko (Russian bird’s milk cake) features a sponge cake base, a light, creamy mousse-like filling, and a decadent chocolate ganache topping.

I’ve been waiting for a while to share this incredibly special cake. Today is my birthday (shout-out to my fellow Libras!), and I am a firm believer that birthdays warrant cake. What better time to share this beauty, right?!

Ptichye Moloko, which translates to “bird’s milk”, is a Soviet-era Russian dessert with layers of sponge cake, mousse-like (or soufflé-like) sour cream filling, and chocolate ganache topping.

Its name, which refers to something that doesn’t exist, alludes to the fact that this delicacy of a cake is rare, unique, and special. Back in the 1980’s, Muscovites would stand in line with a number outside Praga Restaurant to buy this cake.

Let’s make it at home!

This cake isn’t difficult to make. But take note, there are bake times and cool times that you need to be aware of. Read the recipe through before starting to get an idea of the timeline and you’ll be fine.

Why You’ll Love This Recipe

• Impressive, restaurant-quality. This stunning cake will make you feel like you stepped into a bakery in Europe!
• It’s a process to make, but it’s straightforward and not difficult. I’m sharing step-by-step photos to show you how approachable this cake is to make. Read the directions through before starting to get a feel for the process and you’ll be fine.
• If you’ve been looking for a unique cake, bookmark this one. With a sponge cake base, rich and creamy mousse-like sour cream filling, and chocolate ganache on top, this is truly unlike anything I’ve ever had.

What is Bird’s Milk Cake?

This decadent Russian cake is comprised of several layers.

For starters, the sponge cake base. I’ve seen both vanilla and chocolate sponge used. Also, I’ve seen recipes that have multiple sponge layers. Here we use one vanilla sponge cake layer as the base of our Ptichye Moloko.

The really unique part of this cake is the creamy, yet light, mousse-like filling that’s often referred to as a soufflé layer. It’s made of sour cream that’s whipped until fluffy, sweetened, and set (similar to a milk gelatin).

Atop the airy mousse filling is a rich chocolate glaze. A classic chocolate ganache only requires two ingredients, and it’s the easiest part of this recipe to make! I had a little ganache leftover so I let it chill a little in the fridge, whipped it, and piped it onto the top decoratively.

Additionally, this cake also sometimes has a layer of either custard, custard buttercream, or Russian buttercream. (If you’re not familiar with Russian buttercream, it’s essentially sweetened condensed milk incorporated into whipped butter. It’s absolutely decadent, rich, and delicious.) However, I thought this recipe was going to be indulgent enough without another layer added, so I left it out. If you prefer, go ahead and add a layer of custard, custard buttercream, or Russian buttercream.

Ingredients

Step-by-Step Photo Instructions: How to Make Ptichye Moloko

1: Make the Sponge Cake

1. Add the eggs and sugar to a large bowl.
2. Use a handheld electric beater to beat until the mixture is light and fluffy, about 5 minutes.
3. Sift in the flour, cornstarch, baking powder, and salt.
4. Use a rubber spatula to fold the dry ingredients into the wet, being careful not to over-mix.
5. Pour the batter into the prepared pan.
6. Bake at 350F in a lined 9-inch round, 3-inch deep springform pan lined with parchment paper until the cake is golden and puffed, about 20 to 30 minutes. Cool the cake completely, about 30 minutes.

2. Make the Sour Cream Mousse Filling

Once the cake is cool, make the sour cream mousse layer.

1. Add the sour cream and sugar to a large bowl. Use a handheld electric beater to beat until the mixture is light and fluffy, about 7 to 10 minutes.
2. Add the sweetened condensed milk and vanilla, and beat to combine. Set aside for now.
3. Add the gelatin and milk to a saucepan over medium heat, whisking to combine. Bring to a boil, and then add the butter and salt. Continue cooking until the butter is melted, whisking frequently. Remove from the heat.
4. Whisk 1 cup of the sour cream mixture into the gelatin mixture to cool the gelatin mixture a little.
5. Now gradually drizzle the gelatin mixture into the sour cream mixture while whisking constantly. Continue whisking until it’s well-combined.
6. Pour the sour cream mixture onto the cooled sponge cake. Pick the cake up a half inch or so from the countertop and gently drop it to release any trapped air bubbles; repeat this a couple times. Transfer the cake to the fridge to chill completely and set, about 4 hours. (TIP: You’re ready to move onto the next step when the sour cream mixture is chilled and jelled.) Once it’s jelled, remove the side of the springform pan and discard the parchment paper that was on the side. Place the cake on top of a wire rack set on a baking tray because we’ll be topping it with chocolate.

3. Make the Chocolate Ganache Topping and Decorate the Cake

Once the sour cream mixture has jelled, make the chocolate ganache.

1. Add the chopped chocolate to a bowl and pour in the hot cream.
2. Let it sit for 2 minutes, and then gently stir to combine. The heat from the cream will be enough to melt the chocolate.
3. Don’t over-stir; it will look like this.
4. Let the chocolate mixture cool briefly (about 3 to 5 minutes) and then pour it on top of the jelled sour cream mixture.
5. Spread it around with an offset spatula or an icing spatula. Let it drip over the sides as much as you want.
6. OPTIONAL: If you have extra chocolate ganache, chill it in the fridge, and then whip it. Transfer it to a piping bag fitted with a star tip and pipe decorations on top of the cake. If desired, decorate the top with edible luster dust and chocolate pearls.

Storage

Store this cake in an airtight cake container or wrapped well in the fridge for up to 4 days.

Frequently Asked Questions

More Decadent Cakes to Make

• Chocolate Hazelnut Cake
• Karpatka (Polish Carpathian Cream Cake)
• Valentine’s Day Chocolate Layer Cake for Two
• Chocolate Guinness Cake With Vanilla Bean Cream Cheese Frosting
• Reforma Torta (Serbian Reform Cake)
• Black Cocoa Cake (aka Black Velvet Cake)

This post was first published on An Edible Mosaic on September 30, 2022 and updated on September 30, 2026.