The phrase "brownie form" usually refers to a dessert made in a square or rectangular shape, similar to brownies. It means that something is being created or presented in a shape or style similar to a brownie.
Sentences with «brownie form»
Sometimes if you run the processor for a long time, the mixture will all clump together into one ball in the bowl; usually that texture seems to stick together well in brownie form. (acouplecooks.com)