If needed, soften the dates by soaking them in hot water for 20 minutes. Strain well (you can keep the water to add to smoothies or porridge).
In a food processor, turn dates into a paste. Add tahini and maple syrup and process until nice and creamy. Add some water to help things along if necessary. Add the coconut oil (1/3 cup for a harder fudge).
Pour onto parchment paper and refrigerate until hardened, a few hours. Cut into squares and store into an air-tight container in the fridge (fudge will soften at room temperature).