I am in an English course, in Cambridge School, in Lisbon, Portugal, and I am learning Past Perfect.
I am also in a Pastry course, and today we had our first English lesson. The teacher wrote some vocabulary in the board, and we had to make sentences with the vocabulary.
I suggested this sentence:
Before I baked the cake, I had already mixed it.
But, she told me that this sentence was wrong. I explained to her that I was taking an English course in Cambridge, my Cambridge teacher is Scottish, and she taught the Past Perfect this way.
I am confused now, I don't know who is right. The Pastry teacher said that the right way is:
Before he bakes the cake, he had already mixed it.
Before he had baked the cake, he had already mixed it."
Can somebody help me please?