Frozen Samoa Pie with Caramel & Coconut

Ingredients

• 1 ¼ cups shortbread cookie crumbs (5.3-ounce package Walkers Shortbread Rounds)
• 1 tablespoon granulated sugar
• 3 tablespoons unsalted butter, melted
• ¾ cup all-purpose flour
• ¾ cup old-fashioned oats
• ¼ cup packed light brown sugar
• ½ cup chopped pecans
• 1 cup sweetened shredded coconut
• ½ cup unsalted butter, melted
• ½ cup miniature chocolate chips
• 8 ounces cream cheese, room temperature
• 14-ounce can sweetened condensed milk
• 12-ounce container frozen whipped topping, thawed
• 1 teaspoon pure vanilla extract
• 1 cup homemade caramel sauce, divided use