Matcha + Grapefruit Lemonade

1 T. matcha powder
2-3 T. hot water
2 cups fresh grapefruit juice
1 cup fresh lemon juice
1/2 cup cane sugar or honey

Combine matcha powder and hot water and whisk until it forms a smooth concentrated “paste.” Combine fresh grapefruit lemon juices in a saucepan with sugar and bring to a simmer, stirring until sugar is dissolved. Remove from heat and let cool. Pour over ice and top with 1/2 T. of prepared matcha concentrate or more to taste.