Prepare this updated rendition of the classic bar cookie for the holiday dessert table or cookie exchanges.
Preheat oven to 350 degrees. Mix flour, oats, sugar, baking soda, salt, and spices in large bowl. Add butter; stir until mixture is well blended and forms coarse crumbs. Reserve 1/2 (about 2 1/4 cups) for the topping.
Add pumpkin and vanilla to remaining mixture in bowl; stir until well blended.
Press evenly into bottom of greased foil-lined 13-by-9-inch baking pan. Set aside.
Microwave caramels and milk in medium microwavable bowl on HIGH 2 to 3 minutes or until caramels are completely melted, stirring after every minute. Let stand 1 minute. Pour over pumpkin mixture in pan, spreading to within 1/2-inch of edges.
Sprinkle with reserved crumb mixture.
Bake 30 to 35 minutes or until light golden brown. Cool in pan on wire rack. Lift from pan. Cut into bars.