I love a tall glass of iced coffee on warm mornings.
It's best if sweetened with a large dollop of sweetened condensed milk. But that is a luxury I can't always afford, so for every day, I use powdered sugar.
It dissolves in the cold liquid so much better and faster than granulated sugar. I use cold-brew coffee, which has a lovely flavour and won't melt your ice right away!. Top it up with milk (and a splash of cream if you're feeling decadent). Delicious!