Add the cream, milk, sweetened condensed milk, pumpkin purée, pumpkin pie spice, and vodka to a slow cooker. Use a whisk to combine as fully as possible. Pour in the chocolate chips.
2 cups heavy cream, 4 cups milk, 14 oz sweetened condensed milk, 1 cup pumpkin purée, 1 tbsp pumpkin pie spice, 1½ cups Stoli Gluten Free Vodka, 2 cups good quality semisweet chocolate chips