Place a deep baking dish, or similarly durable bowl into the freezer. Place a separate, heat-safe bowl into an ice bath. These will come up later!
In a medium saucepan, use a whisk to combine the half and half and salt.
Start cooking over medium heat, slowly mixing in the Yum Matcha™ powder. Whisk regularly, until the mixture starts foaming around the edges. Do not bring the liquid to a boil.
Remove the pan from the heat, and pour the liquid into the bowl in the ice bath.
Once the mixture is cool, transfer it from the ice bath to the dish in the freezer. Leave to freeze for about forty-five minutes.
As the custard starts to freeze near the edges of the dish, remove it from the freezer and mix using a whisk or rubber spatula. The frozen edges should be spread throughout the entire mix. Then, back in the freezer!
Check on the bowl every 30 minutes, and continue to mix as it freezes. Continue until the custard is frozen throughout. Depending on your freezer, this may take about 2 or 3 hours!
Once frozen, scoop yourself a nice heaping serving of delicious Yum Matcha ice cream! Top with fruit, nuts, candy, or whatever you like!