HEAT olive oil and popcorn in a pot over medium heat. Cover and shake frequently as kernels begin to pop. Remove from heat once popping begins to slow.
MELT butter over medium-high heat in a separate pot. Add brown sugar, stirring constantly, until it begins to bubble.
ADD vanilla extract, sea salt and baking soda to mixture, continuing to stir.
DRIZZLE over popcorn, tossing periodically to make sure it is evenly coated. Serve.