Bring the water to a boil and let it cool down a little.
Meanwhile, place butter, sugar, cinnamon, vanilla and chopped raisins into a large bowl and mix with a large spoon until homegenous.
Dissolve salt and molasses in the water and add to the mixture. Add in oat flour and mix for a minute or two until homegenous.
In a separate bowl, combine whole wheat flour and soda, and add to the mixture. Mix/knead until smooth and all flour is incorporated, about 3-5 minutes.
On a lightly floured surface, roll out the dough to about 1/4" thickness. Cut out cookies using a 1.25" - 1.5" cookie cutter. Collect the cut offs, shape into a ball, re-roll, and repeat.
Transfer cookies to a baking sheet lined with parchment paper. These cookies won't spread, they will only puff up a bit, so you don't need to space them out too much.
Bake the cookies at 250F for about 2 hours or until they are very firm. They should not be soft in the center.
Remove the cookies from the oven and transfer them to a cooling rack. Let the cookies cool completely before serving.
Once the cookies are completely cooled down, store in a glass jar with a lid or any air-tight container.