Lava Cakes

Biscoff Layer Cake

Soft vanilla cake layered with glossy Biscoff filling and silky Biscoff buttercream.

This Biscoff layer cake is full of warm caramelized spice, soft vanilla cake, and creamy filling in every slice. The Biscoff lava is the star: glossy, rich, and smooth enough to settle beautifully between the layers.

The vanilla cake comes together in one bowl to keep the process simple and save a little time. Vanilla bean paste gives it a full, fragrant vanilla flavor that carries the Biscoff beautifully.

Cool the cake layers completely and bring the filling to room temperature before assembly. A sturdy buttercream dam keeps each layer supported while the cake chills into clean, beautiful slices.

Recipe by Angela Heckler

Prep

50 minutes

Bake

20–22 minutes

Total

About 3 hours, including cooling and chilling

Yield

One 3-layer 8-inch cake

Jump to recipe How to make it Watch the reel

Surprise me

Thinking out loud

For the Biscoff Lovers

The cravings, questions, and running commentary behind this bake.

I discovered Biscoff three years ago, and I still can't believe it took me that long. I loved it so much that I started dipping the cookies directly into the Biscoff cookie butter. This cake is for anyone who does the same.

It is loaded with Biscoff in every possible way, while the fluffy vanilla cake keeps everything balanced. That combination makes it nearly impossible to stop at one slice.

Read this first

The quick notes.

Flavor

Vanilla, caramelized spice, and Biscoff

Texture

Tender cake, silky buttercream, and glossy filling

Best moment

The Biscoff filling settling into every slice

From this recipe

Tested notes

The Biscoff filling must be completely cooled to room temperature before assembly so it does not soften the buttercream dam.

For a first filled layer cake, use a conservative amount of filling and keep it below halfway up the dam for dependable support.

Vanilla extract can replace the vanilla bean paste in equal amounts.

Ingredient notes

Key ingredients

Biscoff spread

Biscoff spread gives both the filling and buttercream their warm caramelized cookie flavor. Use smooth spread so the filling stays glossy and the buttercream remains silky.

Vanilla bean paste

I love vanilla bean paste for its fragrant flavor and visible vanilla specks. Vanilla extract is perfectly fine here and will still give the cake a beautiful vanilla foundation.

Yogurt

Yogurt keeps the vanilla layers tender and gives the batter a smooth, cohesive texture.

Heavy cream

Heavy cream smooths the filling and gives the buttercream a soft, silky finish. Bring the cream for the buttercream to room temperature before mixing.

Optional ingredient notes

Use what you have on hand

Curious what I used? These are the exact products I reached for while developing this recipe.

Yogurt

Plain unsweetened yogurt

Plain unsweetened yogurt adds moisture, acidity, and body so the crumb bakes up tender without tasting tangy.

Forager Unsweetened Plain Yogurt

Milk

Milk affects how smoothly a batter, filling, or frosting comes together. Soy milk and Ripple tend to emulsify well because their protein and fat help create a creamy, cohesive finish.

Silk Original Unsweet

Butter sticks

Use butter sticks for buttercream and fillings that need to hold their shape.

Country Crock Plant Butter Sticks

Heavy cream

Heavy cream affects silkiness, looseness, and how buttercream or filling sets after chilling.

Country Crock Heavy Plant Cream

Testing notes

Why this works

A simple one-bowl cake

The sugars and wet ingredients are whisked first, then the dry ingredients go directly into the same bowl. It keeps the recipe moving and saves a little cleanup.

Watch the filling temperature

Let the Biscoff filling cool completely to room temperature before assembly. It should be glossy, thick, and spreadable so it sits neatly inside the buttercream dam.

Build a sturdy dam

Pipe a tall, continuous buttercream ring around each layer. Keep the filling below halfway up the dam so the cake stays supported as the next layer is added.

Pan material

I use light-colored aluminum Fat Daddio's pans for even baking. Silicone pans also work well; place them on a sheet pan for support and check that the center springs back and a tester comes out with a few moist crumbs before removing the cake from the oven.

How it comes together

Biscoff Layer Cake: 01 add biscoff filling

Biscoff Layer Cake: 02 spread biscoff filling

From Instagram

Watch the reel

Watch the vanilla layers, Biscoff filling, and buttercream come together.

Open the reel

Small things that matter

Tips for the best cake

Bring the yogurt, milk, and heavy cream for the buttercream to room temperature for the smoothest mixtures.

Divide the cake batter by weight so all three layers bake to the same height.

Keep the Biscoff filling below halfway up the buttercream dam before stacking the next layer.

If the buttercream begins to soften during assembly, refrigerate both the cake and buttercream briefly, then continue once they are firm again.

Before you slice

Texture and serving notes

For the softest crumb and creamiest filling, let the chilled cake sit at room temperature for 20–30 minutes before slicing.

Use a hot, dry knife for clean slices, wiping the blade between cuts.

Keep it good

Storage

Fridge

Store the assembled cake covered in the refrigerator for up to 4 days.

Note 2

The cake layers can be baked one day ahead, wrapped tightly after cooling, and refrigerated until assembly.

Counter

The Biscoff filling can be made one day ahead and refrigerated. Let it return to room temperature and whisk until smooth before assembling.

Recipe FAQ

Questions that come up

How thick should the Biscoff filling be?

At room temperature, it should be glossy and spreadable and should settle slowly from a spoon. Give it more time to cool if it is still flowing quickly.

Can I use vanilla extract?

Yes. Use the same amount of vanilla extract for a lovely vanilla flavor throughout the cake.

Can I assemble the cake ahead of time?

Yes. Assemble and refrigerate it the day before serving. Let it sit at room temperature for 20–30 minutes before slicing.

Why don't you provide volume measurements?

I know cups feel familiar, but weight is the most reliable way to give you the same result I tested. Flour, sugar, yogurt, milk, and other primary ingredients can vary a surprising amount when scooped or poured, while grams keep the recipe's ratios accurate. A scale is also faster and means fewer dishes because many ingredients can be weighed directly into the bowls already used in the recipe instead of requiring a full set of measuring cups. I still use teaspoons and tablespoons for small quantities like leaveners, salt, spices, and flavorings, where they are the most practical choice.

Can I make this recipe gluten-free?

I have not tested this recipe with gluten-free flour, so I cannot guarantee the same texture, rise, or structure. If you would like to experiment, a cup-for-cup (1:1) gluten-free baking blend intended to replace all-purpose flour is the best place to start. Results may differ from the recipe as written.

Can I use all-purpose flour instead of cake flour?

Yes, but the cake will have a slightly sturdier, less fine crumb. You can replace the cake flour with the same amount of all-purpose flour by weight. For a closer substitute, use 105 g all-purpose flour plus 15 g cornstarch for every 120 g cake flour called for, whisking or sifting them together well. If the recipe separately lists additional cornstarch, keep that amount in the recipe too; this mixture replaces only the cake flour.

Recipe card