Peanut Brittle

Ingredients

• 1 teaspoon baking soda
• 1 teaspoon pure vanilla extract
• 3 cups salted peanuts
• 1/2 cup water
• 1 teaspoon sea salt
• 1 cup light corn syrup
• 3 cups granulated sugar
• 1/2 cup unsalted butter, plus 3 tablespoons for greasing pan