Preheat oven to 350 ˚F and line a cookie sheet with parchment paper.
Combine flour, cinnamon, baking powder, baking soda, and salt in a small bowl. Set aside. (1 cup flour, ¼ teaspoon cinnamon, ½ teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon salt)
Cream together the white sugar, brown sugar, butter, egg, and vanilla. (½ cup white sugar, ¾ cup brown sugar, ½ cup unsalted butter, 1 large egg, 1 teaspoon vanilla)
Combine wet and dry ingredients and mix until just combined.
Stir in the oatmeal and raisins until well mixed. (1 ½ cup old fashioned oats, ¾ cup raisins)
Place large scoops of dough onto the prepared baking sheet and bake for 10-15 minutes, or until lightly browned. Bake 10 minutes for softer cookies and longer for more crunchy.
While cookies are baking, make the glaze.
Combine all the powdered sugar, milk, and extract in a bowl. You can adjust the milk and powdered sugar to get your desired glaze consistency. (½ cup powdered sugar, 1 ½ tbs milk, ¼ teaspoon almond or vanilla extract)
When cookies are done, let them rest on the cookies sheet for a few minutes before transferring to a cooling rack. Drizzle with the glaze.
Enjoy!