Day one: Measure out the flour on a scale or with a measuring cup. Add in a wide glass jar or container.
Mix in the water using a wooden spoon. Scrape down the edges and the spoon.
Leave the starter for 1 hour, then seal the lid.
Day two: Discard half of the starter (about 1/4 cup) Mix the same amount of water and flour for your daily feeding.
Let the starter sit for 1 hour, then seal the lid.
Day three: Discard all but 1/4 cup of the starter (about 2 oz.)
Do a normal feeding with water and flour.
Lay the lid of your container loosely on top and leave.
Days four, five, and six: Continue the same thing as day three.
Day seven: Do a float test to see if the starter is ready. Place a small spoonful of the sourdough starter in water. If it floats, it is ready to use!