Step 1

Preheat oven to 350F with rack on lower middle position. Line baking sheets with parchment and set aside.

Step 2

In a bowl, whisk flour, salt, baking powder, cinnamon, and nutmeg to fully incorporate.

Step 3

In the bowl of a stand mixer fitted with paddle attachment set to medium speed, beat together the butter and both sugars until light and fluffy, 2-3 minutes. Add eggs one at a time and mix until combined. Reduce speed to low and add dry ingredients, beating just until combined – don’t over mix. Gently mix in the oats and chocolate just until combined.

Step 4

Roll dough into 2 TB sized balls and place 2 inches apart on lined baking sheets. Gently flatten each ball into a disk shape. Bake 13-15 minutes or just until edges are golden. Cookies will seem a bit under, but they will set upon cooling.

Step 5

Combine powdered sugar with 2 TB milk, adding a bit more milk as needed for a thick drizzle consistency. Either drizzle onto cooled cookies with a fork, or use a rubber spatula to transfer icing to a Ziploc baggie with a tiny hole snipped out of one corner. Pipe onto cookies as desired.