I am baking a gluten free vanilla cake and I find no matter which recipe I try they are very dense. I have read somewhere that I can brush each layer of cake (before I add the filling) with some liquor. My concern is that just a thin layer will be moist and the rest will remain dense. Any suggestions? I'm baking a cake for my daughters bday and she is GF. I would like for everyone to enjoy a piece of cake at her party.