Make the Honey Peanut Butter Syrup (makes ¾ cup; enough for 24 shots):
In a small saucepan, over medium-high heat, add granulated sugar, peanut butter, honey, and water, whisking until combined. While stirring, allow peanut butter syrup to come to a low boil.
Reduce heat and simmer for 2 to 3 minutes, continuously whisking, as peanut butter can scorch. Pour into a heatproof container and cool to room temperature before using.
Make the Shots
Fill a sandwich-sized Ziploc bag with 2 tablespoons creamy peanut butter and snip off the corner.
Pipe the peanut butter onto the side of the shot glass in any shape or pattern you’d like. It doesn’t have to look pretty.
Dip peanut butter-covered area into the chopped peanuts until all of the peanut butter is covered. Repeat this process for the next three shot glasses.
If the syrup has separated, stir to mix. Fill a cocktail shaker about halfway with ice. Add salt, milk, Skrewball whiskey, peanut butter whiskey, and the syrup.
Replace lid securely and shake until chilled throughout and mixed thoroughly (20 to 30 seconds). Carefully pour into prepared 2-ounce shot glasses.
Notes
Stir syrup before using: It can separate as it cools, so always mix before adding to your drink. Chill your shot glasses: This keeps the shots cold longer and adds a nice touch. Don’t skip the salt: That tiny pinch really makes all the other flavors pop. Make ahead: The syrup can be made up to a week in advance and stored in the fridge.