Add the eggs, 6 tablespoons of oil, the orange juice and 300 ml of warm milk little by little until the dough is very firm.
Let it rise until it doubles in volume, knead it well, if you have a cylinder, it's easier.
Divide into even pieces, make balls and flatten in the palm of your hand, let it rise until it doubles in volume, bake in a preheated oven at 280 degrees for 30 minutes, remove from the oven and fry in hot oil until golden and shiny.
Cream of the filling: beat the condensed milk, the cream, 2 spoons of cornstarch, 700 ml of milk, 2 cups of nest milk in a blender, stir until it thickens, wait for it to cool.
Cut each donut in half, with a pastry bag fill the donuts, sprinkle with icing sugar.