Preheat the oven to 350°F (175°C).

In a mixing bowl, whisk together the flour, cocoa powder, baking soda, and salt.

In another bowl, cream the softened butter and sugar until light and fluffy.

Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the chocolate chips.

Drop spoonfuls of dough onto a baking sheet lined with parchment paper.

Bake for 10-12 minutes or until the edges are set.

Allow to cool on the baking sheet for a few minutes before transferring to a wire rack.