Preheat the oven to 250F and put the popcorn in a big bowl.
In a medium saucepan, combine the brown sugar, corn syrup and butter and bring to a boil over medium heat. Reduce the heat and boil without stirring, swirling the pan occasionally, for 4 minutes. Remove from heat and stir in the baking soda and Sriracha – it will foam up at first, but stir it well to get any lumps of baking soda out.
Quickly pour over the popcorn and stir (with a heatproof spatula or tongs) to coat well. Spread out onto a rimmed baking sheet and bake for 30 minutes, stirring once or twice. Cool and break apart. Serves a medium-sized crowd.
I am a great-grandmother to 3 beautiful children, 2 of which have severe food allergies to dairy, eggs, wheat, peanuts and tree nuts. Food allergies have changed our lives ... for the better. I'm cooking again, and we eat and live healthier!