Custard for eclairs

We prepare all the necessary ingredients.

Pour sugar, flour, vanilla sugar and eggs into a saucepan.

Using a whisk, mix all ingredients until smooth.

Add milk to the resulting mixture in small portions, stirring thoroughly each time.

Place the saucepan with the mixture over low heat.

Stirring constantly, cook the mixture for several minutes. Once it thickens and begins to boil, remove the saucepan from the heat.

Add soft butter to the hot custard mixture.

Using a mixer or whisk, beat the custard mixture with butter until smooth.

Cool the cream. Cover it with cling film, making sure it touches the surface to prevent a skin from forming, and let it cool at room temperature.