I always use Kosher salt in my kitchen! If using table salt, start with half the amount and adjust to taste, as it is much "saltier" by volume.
Instructions
Cookie Dough
Preheat the oven to 350°F and line a baking sheet with parchment paper.
In a food processor or blender, pulse the oatmeal until it has the texture of coarse meal. Be careful not to over-process it into flour. Pour into a large bowl and whisk in the salt, baking powder, baking soda, cinnamon and flour.
In a separate bowl, combine the melted butter, granulated sugar, brown sugar, and vanilla extract until well mixed. Then, add the eggs one at a time, mixing well after each addition.
Now add the dry ingredients to the wet ingredients and mix well. Using a 1-ounce portion scoop or two rounded tablespoons, place the cookie dough onto the prepared baking sheet and bake for 14 minutes. Cool before icing.
Icing
In a bowl whisk together the powdered sugar, milk and vanilla extract until fully combined.
Dip just the tops of each cookie lightly into the icing, allowing any excess to drip off before setting them on a cooling rack. Enjoy!
Notes
Use old fashioned oats. Quick oats will alter the texture of the cookies.
Use a food processor or blender to blitz the oats. Make sure to not over process the oats, you want chunky pieces, not flour.
Let the butter cool for 5-10 minutes at room temperature before mixing with the sugars. This helps prevent the butter from melting the sugars.
Cool the cookies completely before icing them.
The icing should be kind of thick, if to thin it will run off the cookie. Humidity can affect the icings consistency. I recommend starting off with 2 tablespoons of the milk and slowly whisk in more as needed to make the icing.