Bolo de bolacha
A Portuguese home dessert that needs no baking and no heat at all: biscuits dipped in coffee are layered with buttercream and left overnight. Over those hours the biscuits absorb moisture from the cream and turn into layers with the texture of sponge — this is not a biscuit dessert but a cake that baked itself in the fridge. The whole recipe rests on one thing: dipping for one second, no longer.
Your own work in that: 25 min.
- Cream 20 min
- Assembly 25 min
- Chilling 360 min
Step by step
0 / 8 doneBeat the butter and sugar pale
Beat the soft butter with the icing sugar and salt for 6 minutes, until clearly paler and increased in volume. Beating less leaves the cream heavy and greasy — the air worked in here is the only lightness in this dessert.
Ingredients: 250 g butter · 200 g icing sugar · 4 tbsp coffee · 2 pcs egg yolks · 1 tsp vanilla extract · 1 pinch salt
Add yolks and coffee gradually
Beat in the yolks one at a time, then add the cooled coffee a spoonful at a time, beating after each. Coffee added at once splits the cream: this is an emulsion, and too much liquid at once breaks it. Finally beat in the vanilla extract.
Ingredients: 250 g butter · 200 g icing sugar · 4 tbsp coffee · 2 pcs egg yolks · 1 tsp vanilla extract · 1 pinch salt
Coffee a spoonful at a time — all at once splits it.Prepare the dipping coffee
Brew strong coffee, cool it to lukewarm and add the brandy. Lukewarm, not hot — hot coffee dissolves a biscuit in half a second and it will not survive the journey to the cake.
Ingredients: 400 g Marie biscuits · 400 ml coffee · 2 tbsp brandy
Dip the biscuits for one second
Dip each biscuit one second a side and lift it straight out. It should stay hard in the middle — it softens overnight from the moisture of the cream. Soaked now, it collapses as you build.
Ingredients: 400 g Marie biscuits · 400 ml coffee · 2 tbsp brandy
A second a side — the centre must stay hard.Build alternating layers
On a stand lay a layer of biscuits tightly side by side, then a layer of cream, and repeat. Pack the biscuits tightly, filling gaps with halves — gaps make the cake slump when cut.
Ingredients: 250 g butter · 200 g icing sugar · 4 tbsp coffee · 2 pcs egg yolks · 1 tsp vanilla extract · 1 pinch salt
Tight, no gaps — gaps slump when you cut.Finish with cream and coat the sides
End with a layer of cream and spread it over the sides too, smoothing with a spatula. Uncoated sides dry out in the fridge and the edge biscuits stay hard.
Ingredients: 250 g butter · 200 g icing sugar · 4 tbsp coffee · 2 pcs egg yolks · 1 tsp vanilla extract · 1 pinch salt
Chill at least six hours
Chill 6 hours, ideally overnight. This is not just setting: the biscuits must absorb moisture from the cream and change structure. Eaten after two hours it still tastes of biscuits and butter.
Ingredients: 250 g butter · 200 g icing sugar · 4 tbsp coffee · 2 pcs egg yolks · 1 tsp vanilla extract · 1 pinch salt
Scatter with crushed biscuits
Just before serving, cover the top with crushed biscuits and dust with cocoa. Only before serving, because a topping added earlier draws moisture from the cream and turns to paste.
Ingredients: 50 g biscuits · 1 tbsp cocoa
Before you start
Marie biscuits
Portuguese bolacha Maria are round, thin, dry biscuits, sold in many countries under various names; plain tea biscuits such as petit beurre also work well. Avoid crumbly, very buttery or filled biscuits — they fall apart in the coffee or will not stack into even layers.
The version without yolks
Many Portuguese recipes use raw yolks, which give the cream smoothness and colour. Raw eggs carry a risk of salmonella, so use pasteurised eggs, and if the cake is for children, pregnant women or older people, choose the version without yolks: replace them with 3 tablespoons of condensed milk — the cream will be sweeter, so cut the sugar by 50 g.
Three days in the fridge
The cake keeps three days and is markedly better on the second. It does not freeze — thawed, the buttercream separates and the biscuits weep.
