I make this cake when I want something that feels like a “proper” dessert, but I don’t want to turn the oven on or deal with complicated layers. It’s basically a cookie-and-cream style cake: cocoa biscuits softened in milk, a filling that tastes like white chocolate cheesecake mousse, and a thin white chocolate ganache on top.

It’s also one of those recipes that looks like you spent a lot more effort than you actually did. The only thing that matters is taking your time with the layering so it slices clean.

What this cake is like

Texture: soft biscuit layers (almost like cake once it sits), creamy filling, and a slightly firm top layer from the ganache.
Flavor: cocoa + milk chocolatey biscuit base with a sweet, milky white chocolate filling. It’s sweet, so I keep slices on the smaller side.
Time: about 25–35 minutes hands-on, then chilling time.
Pan size: 25 × 15 cm (this is important for the layer count and thickness).

Ingredient breakdown (and why each one matters)

Cocoa biscuits (200 g)

These are the “cake layers.” You want a firm, dry biscuit that can soak up milk without completely falling apart. If your biscuits are very thin and fragile, dip faster.

How many layers? Four layers total, with three layers of filling in between.

Milk (150 ml)

Warm milk softens the biscuits quickly. You don’t need much—just enough to dip.

Tip: Warm, not hot. If it’s too hot, biscuits can turn mushy fast.

Filling ingredients

Cream cheese (150 g)

This gives structure and that slight tang that keeps the filling from tasting like pure sugar. Full-fat works best for a stable filling.

Texture note: Let it soften a bit at room temp so it mixes smoothly.

White chocolate (150 g)

This is the main flavor and also helps the filling set. Melt it gently and cool it before mixing so it doesn’t seize or melt the cream cheese.

Important: Different white chocolates melt differently. Use one you already like the taste of, because you’ll notice it.

Heavy cream / whipping cream (250 ml)

Whipped cream makes the filling light and spreadable. It also makes slicing nicer once chilled.

Goal: soft peaks (not stiff and dry).

Topping ingredients

White chocolate (100 g)

This becomes a simple ganache layer that sets on top. It gives a clean finish and makes the cake feel “done.”

Heavy cream (30 ml)

Just enough to melt the chocolate into a pourable topping.

Equipment you’ll need

25 × 15 cm pan (or a similar-sized dish)
2 mixing bowls
Hand mixer or stand mixer
Small heatproof bowl + saucepan for a double boiler (or a microwave if you prefer)
Spatula
Whisk

Optional but helpful:

parchment paper to line the pan (makes lifting out easier)
a kitchen scale (best for dividing filling evenly)

Step-by-step instructions (exactly how I do it)

1) Prep the pan and milk

If you want easy removal, line the pan with parchment so the paper overhangs on two sides.

Warm the milk (microwave or small pot). Pour it into a shallow bowl so dipping biscuits is quick.

2) Make the filling base: white chocolate + cream cheese

Melt 150 g white chocolate over a double boiler (or in short microwave bursts, stirring often). Then let it cool until it’s no longer hot to the touch—warm is fine, hot is not.

In a mixing bowl, beat 150 g cream cheese briefly—just until smooth. Add the cooled melted white chocolate and mix again until it’s fully combined and glossy.

What you’re looking for: smooth and lump-free. If your cream cheese was cold, you might see small lumps; keep mixing gently until they disappear.

3) Whip the cream and combine

In a separate bowl, whip 250 ml heavy cream to soft peaks. It should hold shape, but still look creamy (not dry).

Add the whipped cream to the cream cheese mixture. Mix on the lowest speed just until combined, or fold with a spatula. Don’t overmix—if you beat it hard, it can lose volume and turn looser.

4) Divide the filling into three equal portions

This is the easiest way to keep layers even.

If you have a scale, weigh the bowl of filling and divide by 3.
If you don’t, eyeball it, but try to be consistent.

Set the three portions aside.

5) Build the layers (4 biscuit layers total)

Now you’ll layer like this:

biscuits
filling
biscuits
filling
biscuits
filling
biscuits (final top layer)

Dip each biscuit in warm milk quickly—think 1 second per side. You want them soaked but still holding shape.

Lay the first layer of biscuits in the pan, fitting them snugly. Break biscuits as needed to fill gaps—this is normal.

Spread the first portion of filling evenly over the biscuits. I use a spatula and take a moment to push filling into the corners.

Repeat with the second biscuit layer and second filling portion, then the third biscuit layer and the third filling portion.

Finish with the fourth and final biscuit layer on top.

Little layering habit that helps: After each biscuit layer, press very gently with your palms or the back of a spoon so everything sits flat. Don’t crush them—just level the surface.

6) Make the topping ganache and pour

Chop 100 g white chocolate (or break into small pieces) and place in a bowl.

Heat 30 ml heavy cream until it just starts to boil (small bubbles around the edges). Pour it over the chocolate and let it sit for 30–60 seconds, then whisk until smooth and slightly thick.

Pour the ganache over the top biscuit layer. Tilt the pan to help it spread, or use a spatula to gently push it to the edges.

7) Decorate (optional, but nice)

I usually grate a little white chocolate on top. If you like contrast, add some dark chocolate too. You can also do cookie crumbs, but keep them light so slicing stays neat.

8) Chill before slicing

Refrigerate for 2–3 hours. Longer is fine (overnight is even better for clean slices).

To slice neatly:

use a sharp knife
wipe the blade between cuts
cut with a straight downward motion rather than sawing

Tips that actually make a difference

Don’t over-soak the biscuits

This is the #1 reason cookie cakes turn into a soft mess. A quick dip is enough—especially because the cake keeps absorbing moisture while it chills.

Cool the melted white chocolate before mixing

If it’s hot, it can:

melt the cream cheese and make the filling runny
create little lumps that are hard to fix later

Warm is okay. Hot is not.

Keep the whipped cream at soft peaks

Stiff peaks can make the filling grainy once mixed. Soft peaks stay smoother and spread easier.

Want cleaner layers?

Line the pan with parchment and chill the cake overnight. The biscuits firm up and the filling sets more evenly.

If your filling feels loose

Pop it in the fridge for 15–20 minutes before layering. This can happen if your kitchen is warm or your cream was slightly under-whipped.

Storage

Fridge: keeps well for 3–4 days, covered.
Freezer: you can freeze it, but the texture changes a bit (cream cheese fillings sometimes get slightly grainy). If you freeze, thaw overnight in the fridge.