Before You Begin
Prepare your cookware as needed. Cooking times and results may vary depending on your equipment and ingredients.
Simmer ⅔ cup applesauce over low heat for about 8–10 minutes until reduced to about ⅓ cup and slightly thickened. Let cool before using.
Preheat oven to 350°F (177°C).and line baking sheets.
Whisk oats, flour, spices, salt, and baking soda.
Cream butter and sugars until fluffy.
Mix in applesauce, egg yolk, and vanilla.
Add dry ingredients; fold in apples and walnuts.
Scoop dough onto prepared baking sheets and bake for about 14–16 minutes, or until the edges are set and the centers appear soft with no visibly wet or shiny dough. Baking time may vary depending on oven performance.
Cool on sheet 10 minutes, then transfer to rack.
Whisk glaze ingredients and drizzle over cookies once cool.