Bitter orange (Citrus aurantium) is a sour fruit native to Asia. Also called Seville orange, sour orange, or zhi shi, this fruit is usually not eaten whole due to its bitter taste. Instead ...

Grating too deep into the orange peel can result in bitter orange zest. Only the outer layer of the orange peel is what you want to remove when zesting since this is what's citrusy and aromatic ...