Oat groats, steel-cut oats, and rolled oats

The canisters look like three different foods. They are the same oat, stopped at different points. A groat is the whole kernel, bran still on, the grain as it left the plant. Steel-cut oats are groats chopped into grits. Rolled oats are groats that were steamed and flattened. Quick oats are rolled thinner. Instant oats were cooked and dried before they reached the box. The more that has already been done to the grain, the faster it cooks, and the less it can still do.

Which one sprouts

Only an intact groat can sprout. The sprout is the germ waking up. Steel-cut oats have been broken. Rolled oats have been heated. A bag that says sprouted rolled oats was sprouted first and then flattened. You cannot sprout it again. The sprouted oat recipes on this site start with whole groats, not with the canister you use for a five-minute breakfast.

How they cook

Rolled oats want a few minutes and a modest amount of liquid. They are the oat for a weekday bowl and for most muffins and cookies. Steel-cut oats want something closer to half an hour and more water. They stay in separate pieces. Groats take longer still, unless you have sprouted and dried them first, which shortens the simmer. Treat them like a small grain, not like flakes. If you pour groats into a recipe written for rolled oats, you will have gravel in a batter.

• Whole groats: sprouting, then porridge or flour once they are dry.
• Steel-cut: a hearty porridge. Not a sprout. Not a muffin batter.
• Rolled, or old-fashioned: breakfast, cookies, and the honey oat muffins that are not the sprouted ones.
• Quick or instant: already processed. Fine in a pinch for a bowl. Wrong for sprouting.

Buy the cut the recipe named. The cheaper box is not a thrifty swap if it cannot do the job. A groat looks like a small tan grain. A flake looks like a flake. If you are standing in the aisle unsure, look at the shape, not at the word natural on the front.