Add the pumpkin puree, half and half, milk, pumpkin pie spice, salt, eggs, brown sugar, maple syrup, and vanilla in an extra large mixing bowl, and mix the custard until fully combined.
1 can Pumpkin puree, 1½ cup Half and Half, ½ cup Milk, ½ cup Brown sugar, ½ cup Maple syrup, 5 Eggs, 1 tablespoon Pumpkin pie spice, ¼ teaspoon Salt, 2 teaspoon Vanilla extract