In a bowl, whisk together tahini and coconut oil. Then stir in maple syrup, sea salt, and vanilla.
Split the mixture into two bowls. To one bowl, add the cacao and cocoa powders, blending until smooth.
Pour the plain mixture into an 8x8-inch pan. Dollop the chocolate mixture on top and swirl using a toothpick or knife to create a marbled effect.
Cover and refrigerate for at least 2 hours (or overnight if you can wait that long!).
Cut into 12 bars and store them in the freezer for a fudge-like texture that’s totally crave-worthy.