'Nearby, Yuka Yoneda tilted her head back as her boyfriend, Albert Yuen, drizzled Tabasco sauce onto her tongue. She swallowed and considered the flavor: “Doughnut glaze, hot doughnut glaze!” '(NYTimes Article)Miracle fruit. Yes, that's what its called:
'When the fleshy part of the fruit is eaten, this molecule binds to the tongue's taste buds, causing bitter and sour foods (such as lemons and limes) consumed later to taste sweet. This effect lasts between thirty minutes and two hours. 'The hour long topsy-turvy taste experience will cost you dearly. Miracle fruits run about $2.50 a piece.
Also: How to Grow Your Own Miracle Fruit (you'll need to be verrrry patient)