Zest of 1 lemon. 2 tablespoons dried butterfly pea flowers, stems removed, chopped fine. In the bowl of a stand mixer, cream butter and sugar. With the mixer on low speed, add vanilla and lemon juice.

Butterfly pea flower lends a blue hue to foods from tea to pasta ... One of the dishes, Butterfly Pea Glass Noodle Salad ($9.80++), has already made it to the permanent menu.

Aside from their distinctive blue hue and magical colour-changing properties, butterfly pea flowers also offer a few nutritional benefits. "Like other richly blue-coloured foods, such as ...