Pour contents of boxed cake mix and canned pumpkin into a mixing bowl and mix until well blended.
Add egg whites and mix until smooth.
Pour batter into greased baking pan and bake as directed according to directions on your mix, or until a toothpick inserted in the center comes out clean. Cool completely.
Combine lowfat milk, almond milk, and sweetened condensed milk in a bowl or large container that you can pour from.
Using a salad fork, poke holes from top to bottom of cake every 1/2 inch over entire surface. Pour milk mixture over entire surface of cake. Cover and refrigerate overnight or for at least 3 hours.
Beat cream cheese with a mixer until smooth consistency. Add 1/2 c cool whip and beat until smooth. Add sugar and vanilla and mix until smooth. In 1/2 c increments, add another 1 1/2 c cool whip to the mixture, mixing until smooth between additions. If mixture is too thick to spread, mix in a little milk until it is a consistency that can be spread easily.
Spread cream cheese mixture over cake. Spread remaining cool whip on top.
Sprinkle with cinnamon chips, if desired, for garnish. Cover and refrigerate until serving.