Place the pitted dates in a bowl and cover with water. Depending on the freshness of the dates they may need to soak for up to an hour. You want them to be soft and malleable and Drain the dates and hang onto the soaking liquid.
In a food processor, pulse the dates until smooth, adding reserved liquid if needed. The mixture should be creamy.
Next add the coconut butter, tahini and cacao powder and continue to pulse until everything is combined into a sticky/creamy mixture.
Press the mixture evenly into a square pan using a spatula or spoon. The fudge should be about 1 inch thick.
Freeze for about 3 hours.
To serve, thaw a bit, and cut into squares.