I bought this Brownie Mix "Ghiradelli Double Chocolate". It's the same mix that this coffee shop uses for their brownies, which I love. Anyway I figured it will be cheaper just to start making them myself, plus I know exactly how many calories are in those evil things. The recipe calls for 1/3 cup of vegetable oil. I was wondering what will be the consequence of adding more water, and less oil, or can I substitute something else for oil?