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Heat the milk in a medium saucepan. Sift the cocoa into the warm milk and stir until smooth with a whisk.
Mix the egg yolks with sugar, a pinch of salt and cornflour. Add a spoonful of the warm milk. Whisk immediately until smooth, otherwise lumps will form.
Pour it back into the pan with the milk and immediately whisk again until smooth. Let it cook gently over low heat, stirring constantly. The chocolate custard is done when it starts to thicken.
You can also check whether it is ready by drawing a line on a spoon; if it remains visible, the custard is cooked.
Place a piece of baking parchment or foil on top to prevent a skin from forming on the surface of the custard. Let the chocolate custard cool completely, enjoy!
Can you make chocolate custard with chocolate instead of cocoa powder?
You can use chocolate instead of cocoa powder, the custard will have a stronger chocolate taste. The chocolate custard will then taste different from the well-known ready-made chocolate custard. You get this familiar taste in this recipe by using cocoa powder.
Can I use semi-skimmed milk?
You can use semi-skimmed milk, the taste will be slightly less rich.
Can I omit the chocolate?
You can make a simple vanilla custard without cocoa powder.