Today is Cinco de Mayo and it is also Friday. So, I am going to dedicate Friday’s cocktail post to the Cinco festivities. But wait… you know I cannot just keep it that simple. Since I have some Guinness on hand after the Guinness Lamb Stew I recently made, why not combine the two? That’s right… a Guinness Margarita. The recipe comes from Heather Christo’s blog and I have to admit I was skeptical about this cocktail. Then I tasted it… and wow! The robust flavors in Guinness are nuanced by the unique tequila flavor while tempered by the citrus and sweetened nicely by the agave nectar. There is a whole lot going on in that glass! I chose…