For the hearty brown soda bread that the Irish swear by every day, you can’t beat Matt Murphy’s Irish Brown Bread. But when you want its light, slightly sweet, raisin-studded cousin, Grammy Brody’s Irish Soda Bread will make your St. Patrick’s Day. This quick and easy soda bread bakes up a celebration-worthy loaf every time, without any need for practice, special skills, or fresh buttermilk. Irish soda bread notoriously calls for buttermilk because its lactic acid activates the soda, creating the bubbles that cause the bread to rise. But really, who keeps buttermilk in their fridge? Sure, it’s easy to make a buttermilk substitute by souring a cup of milk with a tablespoon of…