Preheat your oven to 350°F (175°C). Line an 8-inch square baking pan with parchment paper.
Soak the Medjool dates in warm water for about 10 minutes if needed.
Drain and blend the dates into a smooth paste.
In a large mixing bowl, combine the date paste, tahini, dairy-free milk, and vanilla extract until smooth.
In another bowl, whisk together the cocoa powder, almond flour, baking soda, and sea salt.
Gradually fold the dry ingredients into the wet mixture until a thick batter forms.
Stir in the vegan chocolate chips or chopped nuts if using.
Spread the batter evenly into the prepared pan.
Bake the Tahini Date Brownies for 25–30 minutes or until the center is just set.
Cool in the pan for at least 15 minutes before slicing into squares.