Oatmeal Chocolate Chip Bars

I got this recipe through my mother in law. It's kind of a family staple at get-togethers now.

MIX:
1 cup sugar
1 cup brown sugar
1 cup butter
2 eggs
1 tsp vanilla
ADD:
3 cups instant oats
2 cups flour
1/2 tsp salt
1 tsp baking soda
1 tsp baking powder
1 cup chocolate chips

Press into ungreased jelly roll pan, bakeat 350 for 15-17 minutes. When cooled, combine 1 cup powdered sugar and 1 1/2 TB water, and drizzle over cooled cookies.

**DO NOT overbake these. Watch them carefully as cooking times vary. For some reason they are not good if they are too brown.