Preheat oven to 350°F (175°C).

In a large bowl, mix the soft shortening, sugar, and eggs thoroughly until well combined.

In a separate bowl, sift together the flour, cream of tartar, soda, and salt.

Gradually add the dry ingredients to the wet ingredients, stirring until just combined.

Form the dough into balls, approximately the size of walnuts.

In a small bowl, mix the sugar and cinnamon.

Roll each dough ball in the cinnamon-sugar mixture until fully coated.

Place the cookies 2 inches apart on an ungreased cookie sheet.

Bake for 7 to 8 minutes, or until the edges are lightly golden.

Do not overbake; cookies should remain soft.

Let cookies cool on the baking sheet for a couple of minutes before transferring to a wire rack to cool completely.