In small saucepan over medium-high heat, combine maple syrup, bourbon and butter; bring to boil. Cook, swirling pan, 3-5 minutes, or until mixture thickens to corn syrup consistency. Stir in orange zest and bitters.
Drizzle maple syrup mixture over popcorn; toss to evenly coat. Cool completely and serve.
Notes
Substitute bourbon with rye or whiskey. For “mocktail” popcorn, substitute with non-alcoholic bourbon or whiskey.