When socializing with her mother's friends, Tudor was usually introduced as "Rosamund Tudor's daughter, Tasha", leading others to believe that her last name was Tudor. Liking the sound of it, she adopted the name and eventually changed her surname legally following her second divorce. She married Thomas McCready in 1938. Tasha and Thomas McCready purchased a large old farm in Webster, New Hampshire, where four children, Bethany, Seth, Thomas, and Efner, were raised. Her first story, Pumpkin Moonshine, was published in 1938, as a gift for a young niece of her husband. They were divorced in 1961, and her children legally changed their names from McCready to Tudor. A later marriage, to Allan John Woods, lasted only a brief time.

Tasha Tudor illustrated nearly one hundred books, the last being Corgiville Christmas, released in 2003. Several were collaborative works with a New Hampshire friend Mary Mason Campbell. Her son Seth built the replication of  friends' New Hampshire house while they lived in Marlboro, Vermont and lived next door with his family. It is documented in Drawn from New England, and in The Private World of Tasha Tudor. Mother and son worked closely on family endeavors.

• Pumpkin Moonshine, Oxford University Press, 1938.
• Alexander the Gander, Oxford University Press, 1939.
• The County Fair, Oxford University Press, 1940.
• A Tale for Easter, Walck, 1941.
• Snow Before Christmas, Oxford University Press, 1941.
• Dorcas Porkus, Oxford University Press, 1942.
• The White Goose, Oxford University Press, 1943. 
• Linsey Woolsey, Oxford University Press, 1946.
• Thistly B, Oxford University Press, 1949.
• The Dolls’ Christmas, Oxford University Press, 1950.
• Amanda and the Bear, Oxford University Press, 1951.
• Edgar Allan Crow, Oxford University Press, 1953.
• A is for Annabelle, Walck, 1956.
• 1 Is One, Oxford University Press, 1956.
• Around the Year, Oxford University Press, 1957.
• Becky’s Birthday, Viking, 1960.
• Bruce, Dana, editor, My Brimful Book (with others), Platt, 1960.
• Becky’s Christmas, Viking, 1961.
• First Delights: A Book About the Five Senses, Platt, 1966.
• Corgiville Fair, Crowell, 1971.
• A Time to Keep: The Tasha Tudor Book of Holidays, Rand McNally, 1977.
• Tasha Tudor’s Sampler, McKay, 1977.
• An Advent Calendar, Rand McNally, 1978.
• Tasha Tudor’s Favorite Christmas Carols (with Linda Allen), McKay, 1978.
• Tasha Tudor’s Old-Fashioned Christmas Gifts (with Linda Allen), McKay, 1979.
• A Book of Christmas, Collins, 1979.
• Rosemary for Remembrance, Philomel Books, 1981.
• Tasha Tudor’s Seasons of Delight, Philomel Books, 1986.
• Give Us This Day: The Lord’s Prayer, Philomel Books, 1987.
• The Great Corgiville Kidnapping, Boston, Little Brown, 1997. 

Children’s Books Illustrated

• Mother Goose, Seventy-Seven Verses, Walck, 1944.
• Andersen, Hans Christian, Fairy Tales from Hans Christian Andersen, Walck, 1945.
• Stevenson, Robert Louis, A Child’s Garden of Verses, Oxford University Press, 19447.
• Ewing, Juliana Horatia, Jackanapes, Oxford University Press,, 1947.
• First Prayers, Oxford University Press, 1952.
• McCready, Thomas Leighton Jr.,Biggity Bantam, Farrar, 1954.
• McCready, Thomas Leighton Jr.,Pekin White, Farrar, 1955.
• First Graces, Oxford University Press, 1955.
• McCready, Thomas Leighton Jr.,Mr. Stubbs, Ariel Books, 1956.
• McCready, Thomas Leighton Jr.,Increase Rabbit, Farrar, 1958.
• And It Was So, Westminster Press, 1958.
• Clark, Sara Klein, editor, The Lord Will Love Thee, Westminster Press, 1959.
• McCready, Thomas Leighton Jr.,Adventures of a Beagle, Farrar, 1959.
• The Tasha Tudor Book of Fairy Tales, Platt, 1961.
• Godden, Rumer, Doll’s House, Viking, 1962.
• Moore, Clement C., The Night Before Christmas, St. Onge, 1962.
• Burnett, Frances H., Secret Garden, Lippincott, 1962.
• Burnett, Frances H., Little Princess, Lippincott, 1963.
• Alcott, Louisa May Alcott, A Round Dozen: Stories, Viking, 1963.
• Wings from the Wind: An Anthology of Poems, Lippincott, 1964.
• Bible, The Twenty-Third Psalm, St. Onge, 1965.
• Tasha Tudor’s Favorite Stories, Lippincott, 1965.
• Take Joy! The Tasha Tudor Christmas Book, Lippincott, 1966.
• Grahame, Kenneth, The Wind in the Willows, World Publishing, 1966.
• Shute, Henry A., The Real Diary of a Real Boy, R.R. Smith, 1967.
• More Prayers, Walck, 1967.
• First Poems of Childhood, Platt, 1967.
• Shute, Henry A., Brite and Fair, Noone House, 1968.
• Campbell, Mary M., New England Butt’ry Shelf Cookbook, World Publishing, 1968.
• Alcott, Louise M., Little Women, World Publishing, 1969.
• Campbell, Mary M., New England Butt’rey Shelf Almanac, World Publishing, 1970.
• Campbell, Mary M., Betty Crocker’s Kitchen Gardens, Golden Press, 1971.
• Holmes, Efner Tudor, The Christmas Cat, Crowell, 1976.
• Holmes, Efner Tudor, Amy’s Goose, Crowell, 1977.
• Klimo, Kate, editor, Tasha Tudor’s  Bedtime Book, Platt & Munk, 1977.
• Holmes, Efner Tudor, Carrie’s Gift, Collins, 1978.
• Stevenson, Robert Louis, The Springs of Joy, Rand McNally, 1979.
• Campbell, Mary M., A Basket of Herbs, New England Unit, 1983.
• All for Love, Philomel Books, 1984.
• Dickinson, Emily, A Brighter Garden, Philomel Books, 1989.
• Holmes, Efner Tudor, Deer in the Hollow, Philomel Books, 1990.