From Big Bird's Busy Book, circa the 1970s, here is Cookie Monster's famous Sugar Cookie recipe!
Cookie Monster's Famous Sugar Cookies
Put 3/4 cup of butter or margarine (that's a stick and a half) into your mixing bowl. Measure 1 cup of sugar. Pour sugar over butter. With fork, squash butter and sugar together until they are blended. Crack shells of two eggs and pour eggs over mixture in bowl. Measure 1 teaspoon vanilla and pour over mixture. With fork, blend everything in the bowl together. Measure 2 1/2 cups all-purpose flour and pour over mixture in bowl. Measure 1 teaspoon baking powder and sprinkle over flour. Measure 1 teaspoon of salt and sprinkle over flour and baking powder. Mix everything together either with the fork or with your hands. Put dough in icebox to chill (at least one hour) then roll out the cookie 1/4 inch thick and bake at 400 degrees.
Cookie makes Apple Raisin Oatmeal Cookies in this old Sesame Street episode... well, almost!