1 cup unsalted butter room temperature
1 cup light or dark brown sugar
1/3 cup granulated sugar
2 large eggs
1 tsp vanilla extract
1 1/2 cups all purpose flour
1 tsp of baking soda
1 tsp salt
1/2 tsp ground cinnamon
3 cups old fashioned rolled oats
1 cup dark raisinsPreheat oven at 350 degrees F
Line 2 baking sheets with parchment paper. Bake in the center oven rack.
In your mixing bowl beat the white and brown sugar until smooth and creamy. Add the eggs one at at time mixing well after each addition. Mix in the vanilla.
In a separate bowl add the flour, baking soda, salt, and ground cinnamon. Add the dry ingredients to the butter mixture until well incorporated. Stir in the oats and raisins.
Drop about two tablespoons of dough into a the prepared baking sheets. Flatten the cookie slightly. Bake cookies for about 10-14 minutes or until the edge of the cookies are nice and golden brown but still soft in the center. Cool on a wire rack.
Source: Joy of Baking