How do you substitute brandy for brandy extract in a cake mix?

REduce it on the stove.

Orange Juice

If you are looking to substitute the brandy taste in a recipe, you can use brandy flavored extract. You would not use the same amount, as an extract is concentrated, therefore, you would only use...

well i cant tell u from experience that Pepsi does not so that's a no go bro.

Yes it can, they are both made in the same way and have similar alcohol content so in cooking they are OK. I woudn't recommend drinking either of them.