Preheat your oven to 350℉ while making the batter.
In a large bowl, add the cake mix, pudding, cinnamon, milk and butter. Mix with a mixer until well incorporated.
Add eggs and mix again, scrap bowl with spatula to get all flour mix from bottom of bowl and sides.
If you haven't already, mash the banana with a fork and add the banana, pineapple and pecans into the batter.
Spray the round cake pans with cooking oil and divide the batter into equal parts (as best you can), and place in the oven. Bake for 25-30 minutes or until done.
Once done baking, allow to cool. You will want to cut each circle in half, so there are 4 pieces.
Frosting
Whipped the softened cream cheese and butter, creaming them together.
Mix in the vanilla and powdered sugar. Whip together until creamy and smooth.
Take a piece of the cake and lay it cut side up. Spread 1/4 of the frosting mix, getting it to the edge of the cake.
Repeat this 2 more times with the layers of cake. Last layer, rounded top goes up.
Cover the entire cake with frosting (or leave the edges exposed (your preference)