Pop the Popcorn: Using either a dedicated popcorn maker or the stovetop method, pop the popcorn kernels. Once done, transfer the popcorn into a large mixing bowl, diligently removing any unpopped kernels.
Prepare the Caramel: In a medium saucepan, set over medium heat, combine the granulated sugar, unsalted butter, and light corn syrup. Stir the mixture occasionally as it heats. Once it reaches a boil, stop stirring and let it boil undisturbed for about 4 to 5 minutes, or until the mixture achieves a rich, deep golden hue.
Incorporate Flavorings: Once the caramel has reached the desired color, carefully remove the saucepan from the heat. Stir in the pure vanilla extract, baking soda, and 1 teaspoon of sea salt. Take caution as the mixture will bubble up significantly!
Coat the Popcorn: Immediately pour the hot caramel sauce over the popped popcorn. Using a wooden spoon or a heat-resistant spatula, gently fold the popcorn and caramel together until each piece of popcorn is well-covered.
Bake for Ultimate Crunch: Preheat your oven to 250°F (120°C). Line a large baking sheet with parchment paper and spread the caramel-coated popcorn into an even layer. Bake in the preheated oven for 1 hour, stirring every 15 minutes to promote even crisping.
Cool and Serve: After baking, remove the popcorn from the oven and sprinkle a dash of additional sea salt over the top while it's still warm. Allow the popcorn to cool completely on the baking sheet before breaking it into delightful clusters. If desired, incorporate the optional roasted nuts for an extra crunchy element.
Enjoy the Treat: Serve the caramel popcorn in a big bowl for sharing, or keep some stashed in a sealed container for a deliciously sweet and salty snack on-the-go!
Notes
Optional roasted nuts can be added for extra texture.