Combine the hot water and matcha powder in a heat resistant glass or mug. Whisk vigorously (see note in post) until a thick, frothy layer of tiny bubbles has formed. Add honey or brown sugar now if desired and whisk. It's important to add the sweetener when the drink is still warm, so it will dissolve. Let the mixture cool to room temperature.
Once the drink has cooled down, add the barista blend oat milk and the almond extract. Mix until combined. Finish the iced latte off with 3 to 4 ice cubes and a stainless steel straw. Enjoy!