Put air in the mixture

[Rachel Adams]

The photo is from "Oxford Discover Grammar" by Helen Casey. What does "putting air" mean in this context? "We need to put air in the mixture."

 

[tedmc]

It means beating the mixture manually or with an electric mixer, especially the eggs, sugar and butter initially, until it is fluffy with air mixed into it.

 

[Yankee]

I would be inclined to ask the same question Rachel. I would prefer to read something like, "....and beat the mixture until fluffy".

 

[SoothingDave]

Asking if the eggs were liquid is a strange question. They wouldn't be gaseous or solid if used as an ingredient like this.

 

[Tdol]

It's an odd question for me, as many will not know what whisking, etc, does.