Here is the link to the recipe on Rose's website. http://www.realbakingwithrose.com/recipes/RLB's%20White%20Velvet%20Cake.pdf
In the back of her book The Cake Bible she has charts for making the cake in different size pans for weddings, etc.
Hope this helps. Everyone says this cake tastes like a bakery cake and is wonderful for stacking and carving.