Adapted from Cook’s Illustrated Blueberry Buckle recipe, Published 2005 Streusel: 1 cup packed light brown sugar 1 cup unbleached all-purpose flour 4 tbsp granulated sugar 1/2 tsp ground cinnamon pinch Kosher salt 8 tbsp (1 stick butter), cut into 16 pieces, softened, but still cool Cake: 1 1/2 cups unbleached […]