(No oven )How to make delicious Vanilla custard cream donuts/Custard Filled Donuts Easy recipe

Ingredients (8 Pieces) 160g milk, 7g instant dry yeast, 52g sugar, 7g salt, 1 egg Bread flour 350g, 42g butter Custard Cream: 3 egg yolks, 60 g sugar, 24 g cake flour, 1/2 vanilla bean(can be replaced with vanilla extract), 300 g milk