Pad Thai Popcorn

Ingredients

• 1/4 cup butter
• 1 cup brown sugar
• 1/4 cup lime juice
• 1 teaspoon sriracha hot sauce
• 1 teaspoon salt
• 1/2 teaspoon baking soda
• 8 cups popped popcorn
• 2 cups unsalted roasted peanuts
• 1 tablespoon freshly grated lime zest
• Shredded coconut (optional)