Slice up one serrano pepper into chunks, removing any seeds.
Add cut up serrano pepper, honey syrup, and bitters to mixing glass.
Muddle pepper into syrup and bitters to release flavor.
Add Screwball and bourbon whiskies.
Add ice to mixing glass.
Stir until properly chilled.
Add large ice cube to and old fashioned glass.
Double strain into old fashioned glass.
Garnish with the other serrano pepper.
Enjoy!