I am wanting to make a white ginger cake with a mango filling and a guava passion fruit buttercream. So far the only recipes I have seen call for a regular white cake with ginger ale substituted for the liquid. I am not sure if that is enough of a ginger flavor. Has anyone tried this? Or does anyone have any other suggestions?

I would just add some grated fresh ginger.

I have a ginger cake recipe that is basically white cake with 5 teaspoons of ginger powder added along with 2 tablespoons of lemon peel (I use the microplaner). the lemon peel gives it depth that the ginger alone doesn't have. I love your flavour combinations and my just copy that myself.

thank you both for your suggestions!