Combine the bourbon, beer and maple syrup in a martini shaker. Fill the shaker with ice cubes. Cover and shake about 8 times. Strain the drink equally into 4 large chilled martini glasses. Using a nutmeg grater, grate about 1/8 teaspoon of nutmeg over each martini. Add a chile to each martini and stir to blend. Serve very cold.
Recipe courtesy of Giada De Laurentiis