preheat oven to 350. line pan with parchment paper, leaving an overhang on sides. butter or spray parchment.
2
whisk together butter, sugars, egg, salt, and cinnamon, until smooth. add flour, oats, and raisins. fold until just combined
3
spread batter in pan and bake until a toothpick inserted in center comes out with moist crumbs attached about 25-3- minutes. cool completely in pan, then remove and cut into bars