Quaker Oat Sqaures Party Mix

I picked up Martha's Holiday edition the other day and it got me thinking about a sweet party mix that my friend Jen used to make to give away at the Christmas holidays. The year that I got a tin, I think I demolished the entire tin in two days! Thanks to Jen for sending it on over. (I'll add a pic as soon as I make it, unless I eat it all before I can get to my camera.)

Here it is:
8 cups Quaker Oat Squares
1/2-1 cup pecan pieces
1/2 cup corn syrup
1/2 cup brown sugar
1/4 cup margarine
1 tsp vanilla
1/2 tsp baking soda

Combine cereal and pecans in 13 x 9 baking pan. Combine corn syrup, brown sugar and margarine in sauce pan and heat to boiling. Remove from heat and add vanilla and baking soda. Pour over cereal mixture. Cook at 250 degrees for one hour, stir every 20 minutes. Spread on wax paper to cool.