Most potato varieties fall into one of three major categories: starchy (high-starch), waxy (low-starch) or all-purpose (medium-starch). Unfortunately, grocery stores typically don't categorize their potatoes by starch content. Instead, they sort potatoes into seven types: russet, yellow, white, purple or blue, red, fingerling and new. Each of these types includes many varieties of potatoes that share a similar appearance and starch content.

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