These potatoes originated in South America and are not widely cultivated in the United States. Blue and purple potatoes are most available in the fall. These relatively uncommon tubers have a subtle nutty flavor and flesh that ranges in hue from dark blue or lavender to white. Microwaving preserves the color the best, but steaming and baking are also favorable methods of preparation. They measure about 3 inches long and 1 inch wide.
Most varieties have red, yellow or tan skin and yellow flesh that is creamy and smooth.
A couple of varieties, Purple Peruvian and Red Thumb, have a dry, mealy texture. Located in the produce section of the supermarket, these potato products come wedged, cubed, sliced, shredded for hash browns and mashed. The convenience of frozen potatoes now extends beyond frozen french fries. Mashed, shredded and diced hash browns, seasoned wedges and potato pancakes now fill the freezer section for endless, quick options. The variety and quality of today's dehydrated potato products far surpass the instant mashed potatoes of yesterday.