Preheat the oven to 350 degrees F. Line a baking sheet with a silicone mat or parchment paper.

In a medium-size bowl, whisk together flour, baking soda, kosher salt, and cinnamon. Set aside.

In a large bowl, add apple butter and brown sugar; mix until the brown sugar melts into the apple butter and the mixture becomes smooth. Whisk in the egg and vanilla. Add the grated zucchini and whisk to combine.

Using a rubber spatula, slowly stir in the flour mixture until just combined. Fold in the oats and chocolate chips.

Scoop the dough using a 1-tablespoon cookie scoop onto your prepared pan, spacing the cookies 3 inches apart. Bake for 11-12 minutes, or until the edges are slightly golden brown. Allow the cookies to rest on the pan for 3-5 minutes before transferring to a wire rack to cool completely.