If you’ve had authentic Thai Iced Tea in Bangkok, there’s a good chance it was mixed with sweetened condensed milk. This super thick, rich milk adds a slightly creamy texture to the drink. Feel free to customize this step. We recommend starting with 1 Tbsp of sweetened condensed milk to each glass of tea. You can also use whole milk, half and half, or coconut milk instead of sweetened condensed milk. Just keep in mind that if you use one of these substitutes the tea won’t be quite as sweet (and won’t taste quite as authentic) as if you use sweetened condensed milk.