Preheat your oven to 350°F and line a baking sheet with parchment paper. In a bowl, whisk together flour, baking soda, baking powder, salt, cinnamon, and nutmeg to evenly distribute the dry ingredients and spices.
In a large bowl, beat softened butter with brown sugar and granulated sugar until light and fluffy. This process incorporates air into the dough and helps create a soft cookie texture.
Add the egg and vanilla extract to the butter mixture and mix until fully smooth and combined. Ensuring the egg is completely blended helps the dough bake evenly.
Slowly add the dry ingredient mixture into the wet mixture while stirring gently. Continue mixing until a thick dough forms without visible streaks of flour.
Fold in finely diced apples, caramel bits, and white chocolate chips. Mix gently so the add-ins distribute evenly without overworking the dough.
Scoop cookie dough onto the prepared baking sheet, leaving space between each portion. Bake for 12–14 minutes until the edges turn lightly golden.
Let the cookies rest on the baking sheet for several minutes before transferring to a cooling rack so they set properly.