Place butter, brown sugar, vanilla, eggs, salt, ¼ tsp. nutmeg, 1 tsp. cinnamon, cream of tartar and baking powder in a large mixing bowl and cream with mixer until smooth.
Add unbleached flour and 1 cup cinnamon chips.
Stir with a wooden spoon until well combined.
Smooth into a 9x13” glass baking dish that has been sprayed with cooking spray.
Sprinkle remaining cinnamon chips over top.
Mix granulated sugar, pinch of nutmeg and 1 tsp. cinnamon in a small bowl.
Sprinkle over top of Snickerdoodle Blondies.
Bake at 350° for 30-40 minutes or until toothpick inserted in center comes out clean.
Cool completely before adding glaze.
Cut into bars.