Fudgy Pumpkin Caramel Swirl Bars

Bahan-bahan (16 porsi)

• 3/4 cup butter (melted)
• 2 & 1/4 cups brown sugar (firmly packed)
• 3/4 cup pumpkin (canned, NOT pumpkin pie filling)
• 1 & 1/2 tablespoons vanilla (*)
• 2 & 1/4 cups flour (spooned and leveled)
• 1 tablespoon baking powder
• 1/4 teaspoon baking soda
• 1 & 1/2 teaspoons cinnamon
• 1/2 teaspoon kosher salt
• 1 11 -0z package caramels
• 3 tablespoons milk