Basically a scotch old fashioned mashed with a whiskey sour, the Mark Twain is a deliciously tart and refreshing drink to mix things up when you’re sick of your more typical sours. To make the MT even cooler, it's named after a legendary author, with a story dating back to a letter Twain wrote his wife, talking about his love for this cocktail — drinking it regularly 3 times a day while in London (perhaps this is some insight into his creative process? You tell me…).I'd recommend going with freshly squeezed lemons, 2 oz of scotch, a little lighter on the simple syrup (a quick squeeze) and a little heavier on the bitters (~6 - 8 dashes for me) for the pi approved ratio™.