To plump up raisins, soak in warm water for 15 to 30 minutes before mixing with ingredients. Fully drain water and pat dry with paper towel. This process is OPTIONAL.
Preheat oven to 350 degrees.
Using a stand mixer, whisk butter and maple syrup together on medium speed until blended. Add eggs and vanilla, conitnue whisking until combined.
In another bowl, combine sifted flour, cinnamon, baking soda and salt until blended. Slowly pour this mixture into the butter mixture and set mixer on low to combine ingredient.
Add old fashioned oats and raisins, mixing manually with a spatula or continue using mixer with a paddle attachment until well combined. Do not overwork dough.
Scoop out dough using a cookie or ice cream scoop and place on ungreased cookie baking sheets. This is the equivalent of 2 tablespoons. Bake between 10-12 minutes or until light golden brown. Note: Oven temperature varies so adjust baking time accordingly.
Let cool for a minute on cookie sheets before transferring to a wire rack so they don't fall apart when moved. Cool completely on wire rack. Tip: Line baking sheet with parchment paper then instead of moving each cookie to wire rack, you can just pull the parchment paper with cookies to wire rack.
If ANY leftover, store in an airtight container. Enjoy!