Mix the eggs and the white caster sugar together in a bowl with a hand mixer at medium speed for about 2 minutes until frothy. Sieve the cocoa powder through the mixture and mix it for about 30 seconds together with a hand mixer.
Melt the unsalted butter in a pan over low heat. Little by little, add the melted butter to the egg mixture and mix it all together for 30 seconds.
300 grams unsalted butter
Break the tea biscuits into small pieces. Crumble one-half fine and the other part coarsely for a good mix. You can break the cookies fine in a food processor or by putting them in a plastic bag (or a tea towel) and then hitting them with a rolling pin. Spoon the biscuit crumbs into the mixture.
300 grams Marie biscuits
Line a rectangular cake tin with cling film, aluminum foil, or baking paper, so that no batter touches the tin. Spoon the batter into the cake tin press it well, and leave it in the fridge for at least 4 hours. My recommendation is to leave it in the fridge overnight.
Notes
If you are using a long cake tin, do not fill it completely with the mixture. Put something on one side so you can make the cake tin smaller. In this way, the arretjescake will be less flat.This recipe contains raw eggs, so be careful with pregnant women, children up to five years, the sick, and the elderly. Substitute the egg with half a banana or with 5 tablespoons of vanilla custard. It is easier to cut the arretjescake into pieces with a hot knife. I advise you to cut the pieces not too thick because the cake is very heavy.
Nutrition information is calculated using an ingredient database and should be considered an estimate. In cases where multiple ingredient alternatives are given, the first listed is calculated for nutrition. Garnishes and optional ingredients are not included.