Pumpkin Pie Bars

Bahan-bahan (12 porsi)

• 2 cups all-purpose flour
• 1 cup butter (softened)
• ½ cup granulated sugar
• 29 ounces pumpkin puree (1 can )
• 1 cup brown sugar
• ½ cup granulated sugar
• 4 eggs
• 1 tablespoon pumpkin pie spice
• 1 teaspoon vanilla extract
• 1 teaspoon salt
• 24 ounces evaporated milk (2 cans)
• whipped cream (or whipped topping for serving)