Chocolate Peanut Butter Millionaire Bars

Bahan-bahan (24 porsi)

• 2 sticks (16 tablespoons) salted butter at room temperature
• 2 teaspoons vanilla extract
• 1/2 cup dark brown sugar
• 1 3/4 cups all-purpose flour
• 1 cup creamy peanut butter
• 1/4 cup pure maple syrup
• 1/4 cup melted coconut oil
• 24 ounces semi-sweet or milk chocolate (chopped)
• 2 tablespoons coconut oil
• flaky sea salt