In medium-sized mixing bowl add the milk, cream, sugar, eggs, pumpkin, vanilla, and pumpkin pie spice and whisk until combined.
2 cups milk, 1/2 cup heavy cream, 1/2 cup light brown sugar, 1 cup pumpkin puree, 6 eggs, 2 Tablespoons vanilla, 1 1/2 Tablespoons pumpkin pie spice