Apple Oatmeal Cookies

1. The apple should measure to about 2 cups diced. Add to a medium saucepan along with 2 tablespoons of butter. Place over medium-low heat and cook for about 10 minutes or until tender, stirring occasionally at first and then constantly near the end to prevent any browning.
2. Scoop the apple into a bowl and cover with foil. Sit for 5 minutes to steam and soften further. Then remove the foil and roughly mash with a fork. Measure out a packed ½ cup (you might have the tiniest bit leftover) and set aside.
3. Preheat the oven to 350F and line a large baking sheet with parchment paper.
4. In a large mixing bowl using a hand or stand mixer with the paddle attachment, mix together the butter, granulated sugar, and brown sugar until light and fluffy.
5. Then mix in the egg yolk, vanilla, and cooled mashed apple followed by the baking powder, baking soda, salt, cinnamon, and nutmeg.
6. Once combined, scrape down the bowl and mix in the oats followed by the flour. It will produce a thick and sticky dough.
7. Using a large cookie scoop (3 tablespoons worth), scoop 4-5 cookies onto the baking sheet well spaced apart. Flatten the top of each cookie with your palm to create a hockey puck shape. 
8. Bake for 11-13 minutes or until edges are golden and the center looks slightly underdone. 
9. Allow the cookies to cool on the pan for a minute, then transfer to a cooling rack while you back the rest of the batch.
10. Once the cookies have completely cooled, make the icing.

Icing

1. Whisk together the powdered sugar and egg white, then mix in the warm water. It should have a consistency similar to glue. If it’s too thick, add a touch more water. If it’s too thin, add a touch more powdered sugar. 
2. Dunk the face of each cookie into the icing, just kissing the surface and wiggling around the cookie to ensure the icing reaches the edges. 
3. Flip over and place back onto the cooling rack. After about 15 minutes, the icing will form a skin and harden. 
4. Once all the icing has set, store the cookies in an airtight container at room temperature.