Preheat oven to 350 degrees

Beat 1 ½ cups of sugar, butter and vanilla in mixer at medium speed until well blended.

Add pumpkin puree and eggs (one at a time) and beat until combined.

In small bowl, whisk together flour, baking powder and salt.

Add flour mixture to sugar mixture and beat at low speed until well blended.

Combine remaining ¼ cup sugar and cinnamon in small bowl.

Toss the chopped and peeled apples with 2 tablespoon if the cinnamon sugar.

Fold apples into cake batter and gently combine.

Pour batter into an 8 inch springform pan that is coated with cooking spray.

Lightly sprinkle the rest of the cinnamon sugar on top of the batter.

Bake at 350 degrees for 1 hour and 10 minutes or until cake slightly browns on top (I like to check it at 1 hour with a cake tester).

Cool on wire rack, then carefully remove spring form pan and serve.