
Cinnamon Zucchini Coffee Cake - my favorite coffee cake recipe filled with cinnamon and cooked zucchini. The zucchini tastes like apple when it's cooked with cinnamon and sugar!
Preheat oven to 350°. Spray an 8-inch or 9-inch square pan with cooking spray.
Whisk flower, baking powder, salt, and cinnamon together in a medium bowl.
Stir sugar, oil, and egg in a large bowl. Stir in milk. Stir dry ingredients into wet and stir until just combined. Fold in zucchini. Pour into prepared pan.
Make the crumb topping: stir together brown sugar, flour, cinnamon, and melted butter. Sprinkle over cake batter.
Bake for 30-35 minutes until a toothpick comes out clean.