▷Ingredients(12 donuts)：
■Custard cream
3 egg yolks
50g cane sugar
16g cake flour
250ml milk
1/3 vanilla beans
■Chocolate custard
3 egg yolks
45g granulated sugar
16g cake flour
250ml milk
50g sweet chocolate
■Donuts
350g bread flour
150g cake flour
70g granulated sugar
6g salt
6g instant dry yeast
2 egg + milk = 285g
45g unsalted butter
granulated sugar
cocoa powder