Preheat the oven to 350 degrees Fahrenheit. Cream the butter and sugar together in a large mixing basin until light and creamy. In a separate bowl, whisk together the eggs and vanilla extract.
In a separate basin, whisk together the flour, baking soda, and salt; gradually incorporate into the creamed mixture. Combine the oats and raisins in a mixing bowl. Drop by rounded tablespoons onto baking sheets that haven't been buttered.
Bake for 12-14 minutes, or until golden brown.
Cool for 2 minutes on the pans before transferring to wire racks to cool fully.