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duchess potatoes

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plural noun
  1. mashed potatoes mixed with cream, eggs, butter, and seasonings, piped onto a baking sheet or platter, sprinkled with grated cheese, and browned in the oven.
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Origin of duchess potatoes

First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018