First just let me say that I'm new to this whole forum thing so I'm not sure if I'm posting in the right place but hopefully I can get an answer to my question above. The brownie mix that I'm using only calls for1/2 cup of oil (Im using butter though.) All I need is a ratio for only 1/2 a cup. I've searched elsewhere and have only found ratios for huge batches. I'll just be needing these for the weekend. I appreciate any help guys.