
Activate the yeast if necessary and mix the flour, sugar, and yeast in the mixer bowl.
Add butter, eggs, milk, vanilla, and salt; knead the dough.
Let the dough rise until tripled in size.
Shape and cut dough into doughnuts, let them rise again.
Fry the doughnuts until golden brown and drain them.
Fill the doughnuts with pastry cream and serve immediately.