Calamansi

This citrus is similar to traditional lemons and limes, but it smacks you with a much more potent breed of sour power. It’s like a slightly sweeter lime or a ridiculously sour orange, laced with tropical notes. I use it fresh, in frozen puree form, or if you can’t find either, then sugar-free concentrate will do in a pinch. Once you taste a calamansi, your lemons and limes will fret because they just lost top billing in the citrus show. Calamansi is that good.