To make an ice bath, fill a large bowl halfway with cold water; add a generous helping of ice cubes. Stir until the water is ice cold, adding more ice as needed. The final bath should still have many unmelted ice cubes in it.
When an ingredient is cooked to the degree of doneness you desire, remove it from the pot with a slotted spoon or spider strainer, transfer to your ice bath, and stir. Then scoop the cooled ingredients into a clean dish and continue with your recipe.