Note: Make the maple simple syrup by combining 2 parts maple syrup to 1 part water and gently heating it on the stove until combined and the syrup is a uniform texture. Let cool.
Combine all of the ingredients save for the lemon peel in a mixing glass. Add ice, and stir for 10 seconds. Strain over fresh ice into a rocks or old-fashioned glass. Twist the lemon peel over the cocktail, rub the rim of the glass with it so that the outside of the peel makes contact with the glass, and drop it in the drink.