Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper; this will help prevent the cookies from sticking and make for easy cleanup.
In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, and sea salt until they are thoroughly combined. It’s essential to mix these dry ingredients well as they will help the cookies rise and become fluffy.
In a separate large bowl, whisk together the brown sugar, melted coconut oil, tahini, water, and vanilla extract. Mix until the mixture is smooth and creamy, ensuring no lumps remain. This step is crucial as it combines the sweet and nutty flavors that will make your cookies irresistible.
Pour the dry ingredients into the bowl with the wet ingredients. Using a spatula, gently fold the ingredients together until just combined. Be careful not to overmix, as this can lead to dense cookies.
Now it’s time to fold in the dark chocolate chips. Use your spatula to ensure they are evenly distributed throughout the dough. The chocolate chips should be visible, ready to melt into gooey pockets of goodness.
Using a 2-tablespoon cookie scoop, scoop the dough onto the prepared baking sheets, spacing them a few inches apart to allow for spreading during baking. You should have around 24 cookie dough mounds.
Place the baking sheets in the preheated oven and bake one sheet at a time for about 12 to 14 minutes. Keep an eye on them; the edges should be golden brown while the centers remain soft.
Once baked, remove the cookies from the oven and let them cool on the baking sheet for at least 10 minutes. This cooling step is important as it allows the cookies to set and develop that perfect chewy texture.
After cooling, transfer the cookies to a wire rack to cool completely. They can be enjoyed warm or stored for later!