Toll House Marble Cookie Skillet

Ingredients

• 1/2 cup butter, melted
• 1/4 cup, plus 2 tablespoons sugar
• 1/4 cup, plus 2 tablespoons brown sugar
• 1/2 teaspoon vanilla
• 1 egg
• 1 cup flour
• 1/2 teaspoon baking soda
• 1 teaspoon salt
• 1/2 cup nuts (optional)
• 1 cup chocolate chips
• Flaky sea salt for topping