Preheat oven to 375°F. Then add Cream together butter, shortening and 1 ½ cups sugar. Add vanilla and eggs and blend well.
Add the flour, cream of tartar, baking-soda and salt then stir till blended.
Shape dough by spoonfuls onto balls. I wash my hands with cooking-spray because the dough is a bit sticky. In addition, I like to place one completed tray of snacks that are rolled in the refrigerator while I"m rolling the next. Then when you are ready to roll up them into cinnamon and sugar that they are simpler to take care of.
In another bowl, combine the 4 tbsp granulated-sugar and cinnamon. Roll-balls of dough in mix. Put dough about 2 inches apart on a parchment lined baking-sheet.
Bake for 8-9minutes (do not over bake). Eliminate immediatelyfrom baking-sheets on a cooling-rack to cool completely.