Angel food cake recipe that works in Germany

[Gen 2,454]

That's what I've been doing for years and have wondered why it never worked out like it should. Stella's article above explains why it's not that simple.  I mean you still get an edible cake that's very nice, but it's not what it should be...

[snowingagain 5,441]

Have you tried sifting flour and icing sugar (at least) twice?  And I use 65 g cornstarch to 85 g flour.