The Rosenthal is a modern cocktail that was created by Jon and Lindsay Yeager in Nashville, Tennessee and was first published in their book The Ultimate Guide to Beer Cocktails: 50 Creative Recipes for Combining Beer & Booze. It was based on the Caipirinha and uses a similar template of muddled lime, simple syrup, and cachaça, but this version tops the drink with a strong, malty barleywine ale.
Cut lime into three slices.
Add lime slices pulp side up to a shaker.
Using a muddler, gently muddle lime slices for 5-7 seconds.
Add cachaça and simple syrup to shaker.
Fill shaker with cubed ice.
Shake for 10-20 seconds.
Add fresh cracked ice to a lowball glass.
Using a Hawthorne and fine mesh strainer, strain into lowball glass.
Top with barleywine ale.
Garnish with lime slice.