Preheat oven to 350. Grease and flour 3 loaf pans or a 9x13 inch pan, set aside.
Whisk together sugar, oil, and yogut. Beat in eggs and vanilla.
Whisk together dry ingredients. Stir into wet mixture.
Fold in zucchini. Prepare topping. Pour half of batter into prepared pan/s. Spread evenly. Sprinkle with half topping. Pour remaining batter into prepared pans/. Spread evenly. Top with remaining cinnamon sugar.
Bake 20-30 minutes, varying by pan size.
Notes
I slice a 9x13 inch loaf 5x2 to create 10 mini loaves. Store at room temperature for a few days or for several months in the freezer.