In a glass measuring cup, combine heavy cream, pumpkin puree, vanilla syrup, milk, sweetened condensed milk, and pumpkin pie spice.
Whisk vigorously for 30 seconds to 2 minutes until the mixture becomes foamy and thick, but be careful not to over-whisk. It may take longer if whisking by hand, or quicker with an electric whisk.
Pour cold brew, iced coffee, or iced espresso into a glass over ice, and sweeten with vanilla syrup to taste, leaving some space at the top for the foam.
Gently spoon the pumpkin cream cold foam on top, adjusting the amount to your preference. Sprinkle with additional pumpkin pie spice for that extra seasonal touch.
Sip, savor, and enjoy your homemade Pumpkin Cream Cold Brew!