2 medium pink or red grapefruits
1 750 ml bottle gin (decent quality but don’t go crazy)
Wash the grapefruits. With a vegetable peeler, remove the zest from both grapefruit, avoiding the white pith. Juice the grapefruits and strain out the seeds. In a large jar, add the zest, juice and whole bottle of gin. Shake to distribute, then store in a cool, dark place for 1 month.
After 1 month, strain out the zest and decant into a serving bottle. Enjoy in your favorite gin drink. I particularly like it in a gin and tonic, but it also goes well with a little simple syrup and soda water.