Mix the sugars together in a bowl
Sift the flour, baking soda, salt, cinnamon, and oats together in another bowl.
1.5 cups flour, 1/4 tsp baking soda, 1/4 tsp salt, 1 tsp cinnamon, 1.5 cups rolled oats
Cream the soft room temperature butter and sugars together on high speed for 3-5 minutes.
2/3 cup white sugar, 2 sticks butter (16 tablespoons), 2/3 cup light brown sugar
Add the vanilla and then add the eggs one at a time, beating well after each. Stop and scrape the sides of the bowl once or twice when mixing so that all is incorporated.
1 tsp vanilla, 2 large eggs
Beat the mixture on high until the batter is light and well-blended - 3-5 minutes
Reduce mixer speed to low and add the flour, salt, cinnamon, oats, and baking soda mixture in roughly thirds, mixing each third until just incorporated.
Remove the bowl from the mixer, scrape off the mixer blade with the spatula, and stir in the raisins using the spatula.
1 cups raisins