Preheat the oven to 350°F (175°C). Line your baking trays with parchment paper.
Mix dry ingredients: In a medium bowl, whisk together flour, baking soda, cinnamon, nutmeg, and salt.
Cream butter and sugars: In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar until fluffy.
Add wet ingredients: Mix in apple butter, egg, and vanilla extract until smooth.
Combine the mixtures: Gradually add the dry ingredients to the wet mixture until a dough forms.
Scoop and bake: Drop tablespoon-sized portions of dough onto baking trays. Bake for 9–11 minutes, just until the edges are set.
Cool: Let cookies rest on the tray for 5 minutes before transferring to a wire rack to cool completely.
