Preheat your oven to 350°F (175°C).
In a medium bowl, whisk together the buckwheat flour, baking soda, and salt.
In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
Add the vanilla extract and the egg to the butter mixture and mix until well combined. Gradually add the dry ingredients to the wet mixture, stirring gently until just combined.
Gently fold in the semi-sweet chocolate chips.
Drop rounded tablespoons of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes until the edges are lightly golden and the centers remain soft. Allow to cool on the baking sheet for 5 minutes before transferring to a wire rack.