Pioneer Woman's Best Chocolate Sheet Cake

This weekend was my mom's birthday & I made her Pioneer Woman's Chocolate Sheet Cake.  It was simple to make & didn't take much time at all.  The first night we ate it I thought it was "good" but not "great".  My sister told me it was better the next day & so I tried it & she was right.  It was "great" the next day - more chocolaty and rich.  If you're looking for an easy way to get a rich chocolate cake - this is the way to go.

I did one half with pecans and one without just in case someone didn't want pecans.  I like it better without, but most everyone else wanted the pecans in.  Yum!