Preheat oven to 350 degrees. Butter a 8×8 pan.
3/4 cup unsalted butter, melted
3/4 cup brown sugar
1/4 cup sugar
1/2 tsp salt
1/2 tsp cinnamon
1 cup flour
2 cups old fashioned oats
1 cup raisins
In bowl whisk together butter, sugars, egg, salt and cinnamon.
Add flour, oats and raisins, fold in. Place in greased pan and bake 25-30 minutes.
Cool completely in pan. Cut into squares.