3 smart one...
The same amount of butter as oil. You may have to melt it if it was a fluid measurement.
no
No you don't, just brownie mix, cooking oil, water, and eggs! Have fun!
Obviously, you need a need a new brownie tin! If the brownies ran over the top of the pan while baking, that pan is too small for the amount of batter in your mix or recipe. Use a larger pan.
Brownie mix contains red algae, otherwsie known as carrageenan.
yes
Yes, you can. This will make your brownies richer and possibly sweeter. (This was done with Ghiradelli Brownie Mix)
Normally a brownie mix does not contain leavening agents, whereas a cake mix does include leavening agents. Also, a typical brownie mix will make much less batter than a cake mix.
I think that there is not.
It is always safe to dispose of food that has expired, that is, passed the "use by" date printed on the package. But in common usage, most home cooks would not be concerned about the safety of a year-old brownie mix, as long as the box and inner plastic bag are not damaged.
Trail Mix - 2013 Pot-Brownie Trail Mix Business 1-2 was released on: USA: 10 March 2013