Kristen Tomlan’s mystery treat has for quite some time been crude treat mixture. “I adored sneaking it, eating it with a spoon,” she said. Around two years prior, she started offering a form online that is veggie lover, bakeable and safe to eat crude. Presently she is extending with a Greenwich Village store, including mixture flavors, solidifying it to make frozen yogurt sandwiches and disintegrating it on sundaes and in milkshakes. Blue Marble Ice Cream is utilizing the batter in its treat mixture frozen yogurt, which is likewise sold in the shop. Brownie batter, prepared treats and frozen yogurt pies are accessible: Do, 550 LaGuardia Place (West Third Street), 646-892-3600, cookiedonyc.com.