Think you need to eat green this Saint Patrick’s Day? Think again. Come Saint Patrick’s Day, few desserts can stand up to the mighty Guinness Chocolate Cake – until now.  Irish Red Velvet Cake is as cheery as a wee leprechaun’s cheeks and as fiery as his beard. The crimson batter contains a dusting of cocoa and is bound with buttermilk – both characteristics of a traditional Red Velvet Cake, popular in the American South. But a few glugs of O’Hara’s Irish Red Ale gives this otherwise ordinary cake Celtic edge. This delightful Irish-American fusion makes an ideal dessert for the 40 million Irish Americans who celebrate Saint Patrick’s Day every year. (And, since Saint Patrick’s Day is more widely celebrated by Irish Americans than the Irish, this fusion turns out to be quite apropos.) What is an Irish Red Ale? Irish Red ales are reddish-brown in color and full-bodied. In the case of O’Hara’s, toasted malt sweetens the drink, while a bit of hops deepens the finish. Too much of the bubbly brew can give the Irish Red Velvet Cake a yeasty, bread-like flavor – a modest 1/2 cup does the trick. Cutting back on the …