If a double a brownie recipe what size pan should I use?

I have a recipe for brownies that calls for an 8x8 pan If I double it what size pan should I use?If a double a brownie recipe what size pan should I use?
9'; x 13';If a double a brownie recipe what size pan should I use?
standard sheet pan 9 x 13, it is deep enough so you can even triple a recipe for 8 x 8 if you wish thicker brownies.





same baking temperature, but timing might need more. check center with toothpick and if clean it is done. Watch to not over bake. When it pulls away from the pan a bit, take it out.
Two 8 X 8 pans...