Christopher Kimball heads to Portland, Maine, to visit Tandem Coffee and Bakery's Briana Holt, who shows him both the sweet and savory sides of her baking. First, they make Savory Kale and Two-Cheese Scones, with saltiness from cheddar and pecorino and a sweet counterpoint from dried currants. Then, they bake a Double Chocolate Cake with Honey-Rosemary Syrup, coating the cake with a sweet, herbal soak that perfectly complements the bittersweet chocolate.