"Se lo fai così bruci la torta."

Translation: If you do it like this you burn the cake.

[Viaggiatore]

Since "lo" is masculine, it doesn't refer to the cake. So it seems better to say "if you do it like that."

[NicholasDo2]

If you "make" it like that... no good here?

[tango-alpha]

Also correct to say, "if you do that..."?

[Viaggiatore]

Then you probably wouldn't need the word "cosi'".

[Duomail]

"If you do so, you burn the cake".
Now this is accepted too.