It reads left to right, top to bottom. Ingredients are on the left and then each step boxes around the items involved in that step.

Using the mushroom soup recipe as an example:

(1) Melt the butter.

(2) Wash and dice the onions, celery, and leeks.

(3) Sweat the melted butter from step (1) and the diced onions, celery, and leeks from step (2) together for 6 minutes.