Heat oven to 350%. In large mixer bowl combine all crust ingredients except pecans. Beat at medium speed, scraping bowl often, until well mixed and particals are fine(2 to 3 minutes).Press on bottom of 13 x 9 inch baking pan.Sprinkle pecans evenly over unbaked crust. In 1 Quarter sauce pan,Combine butter & brown sugar.Cook over medium heat,stirring constantly,until entire surface begins to boil.Boil 1 minute,stirring constantly.Pour over pecans & crust.Bake 18-22 minutes or until entire carmel layer is bubbly.Remove from oven.Immediately sprinkle with chocolate chips;allow to melt slightly (2-3 minutes).Swirl chips with a butter knife leaving some whole for a marbled effect.Cool completely;cut into bars.MMmmm!