Ingredient:

• 2 (15 ounce) cans sweet potatoes in light syrup, drained
• 1/2 cup salted butter, melted
• 1 (14-ounce) can sweetened condensed milk
• 1 tablespoon vanilla extract
• 1 tablespoon pumpkin pie spice
• 1 package (2 layer) spice cake mix or yellow cake mix
• 1/2 cup salted butter, cold, cut into small pieces
• 1/2 cup chopped pecans (optional)
• whipped cream or vanilla ice cream, to serve, if desired