You run the risk of the brownies sticking to the pan or burning.
The purpose of a brownie pan is to make a brownie perfect size and cut it (if you want to cut it). Then you can eat the delicious brownie.
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.
The Perfect Brownie Pan phone number is 1-800-531-7935.
WHsmith
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Grease can be used as a noun (the object 'grease'), or as a verb (the act of applying grease to something). For example:'He applied grease to the pan to prevent food from sticking to it.''He was sure to grease the pan to prevent food from sticking to it.'
When you want the item to just release from the pan you grease. When you want the item to have a bit of tooth to rise on (cakes etc) and then release, you grease and flour.
Well... before you put the brownie batter into the pan... you have to grease the pan first! You have to put 1 full tbsp of oil ONTO THE PAN and then spread it everywhere in the pan. Even on the sides. You're welcome! 
It is always best to grease a pan with butter.
The More Corners Brownie Pan has its own website. You can buy it from there or Amazon or several other websites. They do sell nationwide, so call baking stores in your area to see if they have it for sale.
Well, My first question is why are you greasing a roasting pan ?
There are a couple of different methods available to grease an aluminium pan. You can use a cooking spray or you can use a small piece of waxed paper with cooking oil to coat the pan.