well that specific brand of brownies has it measured to use for that brand, they vary from brand to brand

id use the box recipie, cook the pot how the site shows but use the mesurement that the box says....

if not you might end up with some potent brownies but they might taste like shit...... ya know what i mean

as far as temp. ive extracted using alcohol before and ive seen that about 165-170 works for that, but as far as oil goes....... thats a different ballpark man

hope this helps .... =)
Ronjohn