WARM: If using ultra-pasteurized milk, gently heat milk to 110°F — boiling is not necessary. If using milk that has not been ultra-pasteurized, slowly heat the milk to 212°F (100°C), stirring frequently to prevent scorching. Once heated, remove from heat and allow it to cool to 110°F (43°C) before proceeding.
MIX: Pour into the insulated mug and gently stir in 1 sachet Easy Skyr Yogurt Starter (or ¼ cup of Easy Skyr Yogurt from a previous batch) until dissolved.
INCUBATE: Close the lid, wrap with a towel, blanket, or similar insulation on all sides, including top and bottom. Place in an insulated cooler. If the room temperature is 75°F or above, it is usually fine without the cooler. Incubate for 8-10 hours or up to 24 hours until the texture has thickened.
STORE: When the yogurt has thickened and has a pleasant tangy flavor, your yogurt is ready. Secure the lid and refrigerate for at least 6 hours to set. The yogurt will continue to firm up as it chills. Keep the finished yogurt in the fridge.
OPTIONAL: After refrigeration, strain the yogurt using a yogurt strainer, cheese cloth, or ultra-fine mesh strainer.