Then sprinkle 1-2 tsp cinnamon sugar mixture in the center
Then top with another 1tbsp batter
Bake at 350 for 18/19 min
After 10 min remove from tray and onto cooling rack
Whip icing ingredients together until smooth, adding more milk as needed. Taste for sweetness (will depend on your protein powder) and can add more powdered sugar if needed. Refrigerate to firm if needed
Ice once completely cooled
Sprinkle with cinnamon sugar mix
Video
Notes
Can sub the protein powder with oat flour if you prefer.