SPRAY the inside of the slow cooker with cooking spray.
SPREAD the pumpkin evenly on the bottom of the slow cooker.
MIX the JELL-O Pudding and cake mix together in a separate bowl.
SPREAD the JELL-O and cake mixture evenly over the pumpkin in the slow cooker and drizzle the melted butter over the top.
SPRINKLE a dash of cinnamon across the top.
COOK on high for 3 hours. Serve with COOL WHIP on top and enjoy!