1 teaspoon (a heavy pinch) flaked salt for garnish
Preheat oven to 200 degrees. In a heavy bottom saucepan on the stove, bring dark brown sugar, butter and maple syrup to a boil. Continue to boil, stirring constantly, for 5 minutes. Turn off the heat and add vanilla bean paste, maple extract, and baking soda. Let it cool slightly before proceeding to step 2.
On a lined cookie sheet, pour mixture over popcorn, mix to coat evenly. Sprinkle flaked salt over top and let popcorn set up in the oven, about 10 minutes. Cool completely and enjoy.