In a medium size pot, add the heavy whipping cream, condensed milk, milk, and vanilla extract. Make sure to whisk very well until the condensed milk has been mixed in fully.
Add the pumpkin puree and pumpkin pie spice and whisk again until well combined.
Put the pot on the stove and bring to medium heat. Let is get hot, but do not let it cook. Let it get hot on the stove for about 4-6 minutes. Then remove from the heat and let it fully cool down.
You can keep this in the fridge for 4-7 days. Mix with hot or cold coffee.