1 Pre-heat an oven to 180°C (350°F).
2 Grease an 8-inch square baking pan and line the bottom with parchment paper, leaving an overhang on two sides..
3 In a large bowl, whisk together butter, sugars, egg, salt, and cinnamon powder until smooth.
4 Add flour, oats, and raisins and mix together.
5 Spread the batter into the prepared pan, and bake for 25-30 minutes or until a toothpick inserted in the center comes out with clean, with light moist crumbs attached.