Mix the maple syrup, water and eggs in a bowl until well combined. You can use a whisk, an electric mixer or just a spoon.
Add the vanilla and mix again.
Add the oatmeal, flour, baking soda and salt. Mix well until everything is combined and the dough starts to come together
Add the raisins and mix well.
Cover the bowl and chill the dough in the fridge for about one hour.
Preheat the oven to 350°F. Line two baking sheets with parchment paper.
Take the dough out of the fridge, using a spoon or an ice cream scoop, make small balls of cookie dough on the baking sheets.
Bake the cookies for 13 to 16 minutes until their bottoms are light brown.
Let cool completely before serving.