4 layer Pumpkin Cake

1 pkg. (2-layer size) yellow cake mix
1 can (15 oz.) pumpkin, divided
1/2 cup milk
1/3 cup oil
4 eggs
1-1/2 tsp. pumpkin pie spice, divided
1 pkg. (8 oz.) PHILADELPHIA Cream Cheese, softened
1 cup powdered sugar
1 tub (8 oz.) COOL WHIP Whipped Topping, thawed
1/4 cup caramel ice cream topping
1/4 cup chopped PLANTERS Pecans

Preheat oven to 350°F.

BEAT cake mix, 1 cup pumpkin, milk, oil, eggs and 1 tsp. spice in large bowl with mixer until well blended. Pour into 2 greased and floured 9-inch round pans.

BAKE 25 to 30 min. or until toothpick inserted in centers comes out clean.

Cool in pans 10 min.

Remove from pans to wire racks; cool completely.

BEAT cream cheese in medium bowl with mixer until creamy. Add sugar, remaining pumpkin and spice; mix well. Gently stir in COOL WHIP.

Cut each cake layer horizontally in half with serrated knife; stack on serving plate, spreading cream cheese filling between layers. (Do not frost top layer.)

Drizzle with caramel topping just before serving; top with nuts.

Refrigerate leftovers.