Popcorn Crunch Sundae

INGREDIENTS

• 6 unsalted butter, cut into 1/2-inch pieces, plus more for pan
• 3 popped popcorn
• 1/2 salted roasted peanuts
• 3/4 sugar
• 2 light corn syrup
• 1/3 sugar
• 1/4 natural unsweetened cocoa powder
• 3 light corn syrup
• 1/4 (1/2 stick) unsalted butter
• 1 semisweet chocolate, chopped
• 1/2 vanilla extract
• 1/8 kosher salt
• 2 dulce de leche ice cream