Combine the dry ingredients: In a medium bowl, whisk together the oat flour, baking soda, cinnamon, and salt. Set aside.
Mix the wet ingredients: In a large bowl, combine the oil, almond butter, brown sugar, granulated sugar, and vanilla extract. Stir until evenly combined.
Add the eggs and oats: Add the eggs and mix until fully incorporated. Stir in the rolled oats until evenly coated.
Add the dry mixture: Pour the dry ingredients into the wet mixture. Gently stir until no dry patches remain and a thick cookie dough forms.
Fold in the apples: Add the finely diced apples and gently fold until they are evenly distributed throughout the dough.
Chill the dough: Cover the bowl and refrigerate the cookie dough for 1 hour.
Prepare the oven and pan: Preheat the oven to 350°F (175°C). Line a large baking sheet with parchment paper.
Scoop and shape: Use a small cookie scoop to portion the chilled dough onto the prepared baking sheet. Leave space between the cookies, then gently press each portion with the bottom of a glass.
Bake: Bake for 13 to 15 minutes, or until the cookies are set and lightly golden around the edges.
Cool and serve: Allow the cookies to cool on the baking sheet for about 10 minutes. Carefully transfer them to a wire rack or serving plate and enjoy.