"好看的蛋糕"用英语可以说成"a beautiful cake"。

"Beautiful"是英语中的形容词，意思是美丽的、优美的、迷人的。

"Cake"是英语中的名词，意思是蛋糕。

下面是一些例句：

"I'm going to make a beautiful cake for my friend's birthday."（我要为我的朋友的生日做一个好看的蛋糕。）
"Look at that beautiful cake in the window! I want to buy it for my mother's birthday."（看看那个橱窗里好看的蛋糕！我想买给我妈妈的生日。）
"I can't bepeve how beautiful this cake is! It looks too good to eat."（我真不敢相信这蛋糕有多好看！看起来太好吃了。）