Mix 1 1/2 cups softened butter, 1 cup sugar, and 2 eggs together thoroughly. Sift together 2 3/4 cups flour, 2 tsp cream of tartar, 1 tsp soda, and 1/2 tsp salt and stir into sugar mixture. Chill dough. Roll into walnut sized balls, then roll in mixture of 2 TBSP sugar and 2 tsp cinnamon. Place 2" apart on cookie sheet. Bake at 400˚ until lightly browned, about 8-12 minutes.
Adapted from Amish Cooking and Canning, Buchanan County, Iowa