"A wonderful, rare Christmas treat! Make sure snow has fallen for 2 hours, as it takes that to clean air pollutants. Then take a clean blanket, and collect the snow. Enjoy!"
Whisk milk, sugar, sweetened condensed milk, and vanilla extract together in a large bowl. Add snow to milk mixture, about 1 cup at a time, until ice cream is thickened. Freeze for 2 hours.