Preheat oven to 350 degrees. Line two baking sheets with parchment paper. Makes approximately 2 dozen cookies.
Using a stand mixer or hand held beaters in a large bowl, cream together the butter and sugars until light and fluffy.
Scrape down sides of bowl. Add egg and pure vanilla extract, mixing to incorporate.
In a large bowl, sift together the spelt flour, oats, baking powder, baking soda and sea salt.
Slowly add the dry ingredients to the butter mixture and mix until combined.
Throw in the raisins and mix until incorporated.
Scoop out 2 inch balls of cookie dough onto baking sheets, evenly spaced.
Add a few crystals of Maldon sea salt to the tops of each cookie.
Bake for 13-15 minutes, depending on how hot your oven gets, turning pans halfway through baking time.