Place this upside down onto some parchment greaseproof paper.

将其颠倒放在一些烘焙纸上。

And I've made a piping bag with greaseproof paper.

我用防油纸做了一个裱花袋。

And just put a couple of pieces of greaseproof on the top to protect it.

上面放两张防油纸以免蛋糕烤焦。