Start by slicing off the stems by cutting the chard crosswise at the intersection of the leaves and stems.
Stack the chard leaves on top of each other. Then, slice them lengthwise into strips about 1-inch wide.
Cut the strips crosswise into pieces of your desired size.
Finally, cut the stems crosswise into pieces of your desired size.
If you are using the chard right away, place it in a colander and rinse with cold water to clean. Pat dry after cleaning.
If you want to store the cut chard before using it, don't wash it. Instead, place it between paper towels (or a clean dish towel). Put it in a plastic bag or a reusable silicone bag. Seal tightly. Store in the crisper drawer of the refrigerator for up to 7 to 10 days. Wash before using.
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Notes
1 bunch of chard yields about 4 to 6 cups of loosely packed leaves and 1 cup of sliced stems, depending on the size of the bunch and leaves
Chard leaves can be eaten raw in salads or smoothies. Stems are typically included in cooked dishes.
Cooked chard leaves and steams can be served as a side dish or added to soups and egg bakes.