It's so hard to find baking materials and ingredients in manila like buttermilk and baking powder. Do you have any idea where I can purchase them?

You can go and visit Chocolate Lover Inc located at P.Tuazon Blvd, Cubao. It's my go to place for all my baking needs! Price is also a bit cheaper compared to malls and supermarkets. Here's their website so you can also check their other products: http://achocolatelover.com/products_baking_basics