Inside a lab in Aurora, Colorado, scientists at Mycotechnology have been trying to figure out a way to replace sugar with mushrooms. Certain mushrooms, the logic goes, can take away bitterness and naturally sweeten foods, like coffee and chocolate. The startup has most recently engineered a dark chocolate bar (with 8 grams of sugar and 293 calories) that has had about 66% of its sugar replaced with mushrooms, Mycotechnology’s CEO, Alan Hahn, tells Business Insider. “Our goal from the…