In a large bowl cream together the butter and icing sugar until smooth. Beat in the egg and stir in the vanilla and almond extract. Combine the flour, baking soda and cream of tartar then blend into the creamed mixture. Cover and chill for at least two hours.
Preheat the oven to 190 degrees C. Grease 2 baking trays.
Divide the dough into two parts. On a lightly floured surface, roll each piece of the dough out to 1/2cm in thickness. Cut into desired shapes with cookie cutters. Place cookies 5cm apart on the prepared baking trays. Sprinkle cookies with plain or colored sugar.
Bake for 8 minutes in the preheated oven until lightly browned. Allow cookies to cool on the baking tray for 5 minutes before removing to a wire rack to cool completely.