Monticello Lawnmower Posted by The Boston Shaker 2 1⁄2 oz Rye 2 oz Ginger beer, Barritt's 1 bsp Sugar (cane syrup) 3 ds Bitters 3 spg Mint 2 sli Lime InstructionsCombine mint, syrup, bitters and lime in mixing glass. Muddle. Add rye and shake. Pour into ice-filled Collins glass. Top with Barritt's.