Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a large bowl, whisk together the whole wheat flour, rolled oats, baking soda, and salt.
In a separate bowl, whisk together the melted coconut oil, honey (or maple syrup), egg, and vanilla extract until smooth.
Pour the wet ingredients into the dry ingredients and mix until just combined. Fold in the dark chocolate chips.
Scoop tablespoon-sized portions of dough onto the prepared baking sheet. Gently flatten each cookie slightly with the back of a spoon.
Bake for 10–12 minutes, or until the edges are lightly golden and the centers still look slightly soft.
Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack. Enjoy warm or store for later.