Cinnamon Sugar Zucchini Coffee Cake tastes like a soft, tender cinnamon roll collided with a buttery crumb cake and decided to stay for breakfast. It works perfectly for anyone who wants a cozy, bakery-style treat in about 1 hour from start to finish. I tested this on a sleepy Sunday morning in my tiny kitchen while my dog judged my crumb-topping skills from the doorway.
Why You Should Try This Cinnamon Sugar Zucchini Coffee Cake
This Cinnamon Sugar Zucchini Coffee Cake tastes incredibly moist, warmly spiced, and slightly caramelized around the edges. The zucchini melts into the batter, so you get extra moisture and tenderness without any strong veggie flavor.
You can serve it as a breakfast treat, afternoon snack, or easy dessert that feels special but still uses simple pantry ingredients. It also gives you a tasty way to use up that extra zucchini that keeps multiplying on the counter.
“This Cinnamon Sugar Zucchini Coffee Cake tastes like a bakery classic with a secret veggie upgrade, and I would happily eat it every weekend. ★★★★★”
Ingredients You’ll Need
Dry ingredients
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All-purpose flour
- Use regular unbleached flour.
- If you use whole wheat pastry flour, swap only half so the cake stays tender.
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Granulated sugar
- Any standard white sugar works.
- Organic cane sugar works too, but it can add a slightly deeper flavor.
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Light brown sugar
- Packs into the measuring cup.
- Store it in an airtight container so it stays soft.
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Baking powder
- Check the date so it still lifts the cake properly.
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Baking soda
- Helps the cake rise and brown nicely.
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Fine sea salt
- Table salt works, but reduce slightly since it tastes saltier.
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Ground cinnamon
- Use fresh, fragrant cinnamon for the best flavor.
- Saigon or Ceylon cinnamon both work; Saigon tastes stronger and spicier.
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Ground nutmeg (optional)
- Adds a cozy bakery-style note.
- Freshly grated nutmeg tastes stronger, so use a light hand.
Wet ingredients
-
Large eggs
- Use room temperature eggs so they mix smoothly into the batter.
-
Neutral oil (canola, vegetable, or light olive oil)
- Oil keeps the cake moist longer than butter.
- You can use half melted butter and half oil for extra flavor.
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Whole milk or buttermilk
- Buttermilk adds a slight tang and extra tenderness.
- If you only have 2% milk, use that and add 1 teaspoon of white vinegar to mimic buttermilk.
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Vanilla extract
- Use pure vanilla for the best flavor.
- I like Nielsen-Massey or Costco’s pure vanilla for a good balance of price and quality.
Zucchini
- Fresh zucchini, finely grated
- No need to peel; the green flecks look pretty in the cake.
- Pat the grated zucchini with paper towels to remove excess moisture, but do not squeeze it bone dry.
- Small to medium zucchini taste sweeter and milder than giant ones.
Cinnamon sugar swirl and topping
- Granulated sugar
- Light brown sugar
- Ground cinnamon
- Melted butter
- Salted butter tastes great here and balances the sweetness.
- If you use unsalted butter, add a tiny pinch of salt to the topping mixture.
Optional mix-ins
-
Chopped toasted pecans or walnuts
- Fold into the batter or sprinkle over the top for crunch.
-
Mini chocolate chips
- Use a small handful if you like a chocolate twist.
Equipment list
-
9×13 inch baking pan
- Metal pans bake more evenly than glass.
- If you use glass, reduce the oven temperature by 25 degrees.
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Large mixing bowl
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Medium mixing bowl
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Whisk
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Rubber spatula
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Box grater or food processor with grating disc for the zucchini
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Measuring cups and spoons
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Cooling rack
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Parchment paper (optional, but it makes lifting the cake easier)
Tips & Tricks
- Squeeze the zucchini gently with paper towels so it feels damp, not dripping, to avoid a gummy texture.
- Measure flour by spooning it into the cup and leveling it off so the cake stays light and tender.
- Mix the batter just until it comes together so you do not develop too much gluten.
- Use room temperature eggs and milk so the batter blends smoothly and bakes evenly.
- Line the pan with parchment and leave a little overhang so you can lift the cake out easily for slicing.
- Swirl the cinnamon sugar gently into the batter with a knife or skewer so you keep visible ribbons instead of mixing it in completely.
- Check the cake a few minutes early since every oven runs slightly different, and pull it when a toothpick comes out with a few moist crumbs.
- Let the cake cool at least 20 minutes before cutting so it sets and slices cleanly.
- Add nuts only on half the pan if some people in your house claim nut allergy or just nut drama.
- Serve slightly warm for the best texture and flavor.
How to Make Cinnamon Sugar Zucchini Coffee Cake
Step 1: Prep the pan and oven
Preheat your oven to 350°F. Grease a 9×13 inch pan with butter or nonstick spray, then line the bottom with parchment if you want easy removal. Set the pan aside while you mix the batter.
Step 2: Grate and prep the zucchini
Wash and dry the zucchini. Grate it on the small or medium holes of a box grater. Pile the grated zucchini onto a couple of layers of paper towel or a clean kitchen towel and pat it until it feels damp but not soggy, then set it aside.
Step 3: Mix the cinnamon sugar topping
In a small bowl, stir together granulated sugar, brown sugar, and cinnamon. Add melted butter and mix until the mixture looks like wet sand and small clumps form. Set this bowl aside for the swirl and topping.
Step 4: Combine the dry ingredients
In a large bowl, whisk together flour, granulated sugar, brown sugar, baking powder, baking soda, salt, cinnamon, and nutmeg if you use it. Break up any brown sugar clumps with your fingers. Keep whisking until everything looks evenly combined and uniform.
Step 5: Whisk the wet ingredients
In a separate medium bowl, whisk the eggs until they look slightly frothy. Add oil, milk or buttermilk, and vanilla, then whisk until smooth. Stir in the grated zucchini until it spreads evenly through the liquid mixture.
Step 6: Bring the batter together
Pour the wet ingredients into the bowl of dry ingredients. Use a rubber spatula to fold the mixture gently until no big streaks of dry flour remain. If you use nuts or chocolate chips, fold them in at the end with just a few strokes.
Step 7: Layer and swirl the batter
Spread half of the batter into the prepared pan and smooth it into an even layer. Sprinkle about one third to half of the cinnamon sugar mixture over this first layer. Dollop the remaining batter over the top, spread it gently, then sprinkle the rest of the cinnamon sugar over the surface.
Step 8: Add the swirl
Use a butter knife or skewer and drag it through the batter in gentle S-shaped motions across the pan. Turn the pan and repeat in the other direction to create a loose crosshatch pattern. Keep the motion light so you keep distinct ribbons of cinnamon sugar instead of blending everything together.
Step 9: Bake the cake
Place the pan in the center of the oven. Bake for 30 to 40 minutes, depending on your oven, until the top looks golden and a toothpick inserted in the center comes out with a few moist crumbs. If the edges brown too quickly, tent the pan loosely with foil during the last few minutes.
Step 10: Cool and slice
Set the pan on a cooling rack and let the cake cool at least 20 to 30 minutes. If you lined the pan with parchment, use the overhang to lift the cake out before slicing. Cut into squares and serve warm or at room temperature.
What to Serve with Cinnamon Sugar Zucchini Coffee Cake
Serve Cinnamon Sugar Zucchini Coffee Cake with hot coffee, cold brew, or a simple mug of black tea or chai. Kids usually love it with a glass of cold milk or chocolate milk. You can also pair it with a bowl of fresh berries or sliced fruit for a lighter touch. If you serve brunch, add scrambled eggs, yogurt, and a simple fruit salad to balance the sweetness.
Storage Options
- Store leftover cake in an airtight container at room temperature for up to 2 days.
- Keep it in the fridge for up to 5 days if your kitchen runs warm, and let slices come to room temperature before serving.
- Freeze individual slices tightly wrapped in plastic, then place them in a freezer bag for up to 2 months.
- Reheat slices in the microwave for 10 to 15 seconds or warm them in a 300°F oven for 5 to 8 minutes until soft and just heated through.
Cinnamon Sugar Zucchini Coffee Cake
Ingredients
Instructions
- Preheat the oven to 350°F (175°C). Grease a 9x13-inch baking pan with butter or nonstick spray and line the bottom with parchment paper if desired. Set aside.
- Wash and dry the zucchini. Grate it on the small or medium holes of a box grater. Pile the grated zucchini onto a couple of layers of paper towel or a clean kitchen towel and gently pat until it feels damp but not dripping. Set aside.
- Make the cinnamon sugar mixture: In a small bowl, stir together the granulated sugar, brown sugar, and cinnamon. Add the melted butter and mix until the mixture looks like wet sand and small clumps form. Set aside for the swirl and topping.
- In a large bowl, whisk together the flour, granulated sugar, brown sugar, baking powder, baking soda, salt, cinnamon, and nutmeg (if using), breaking up any brown sugar clumps with your fingers until the mixture looks evenly combined.
- In a medium bowl, whisk the eggs until slightly frothy. Add the oil, milk or buttermilk, and vanilla and whisk until smooth. Stir in the grated zucchini until evenly distributed.
- Pour the wet mixture into the dry ingredients. Using a rubber spatula, fold gently just until no big streaks of dry flour remain. If using nuts or mini chocolate chips, fold them in with a few strokes at the end; do not overmix.
- Spread half of the batter into the prepared pan and smooth it into an even layer. Sprinkle about one-third to one-half of the cinnamon sugar mixture evenly over the batter.
- Dollop the remaining batter over the cinnamon sugar layer and gently spread it to cover. Sprinkle the remaining cinnamon sugar mixture evenly over the top.
- Use a butter knife or skewer to gently swirl the batter and cinnamon sugar in loose S-shaped motions across the pan, then turn the pan and repeat in the other direction to create a light crosshatch pattern. Do not overmix; you want visible ribbons of cinnamon sugar.
- Bake in the center of the oven for 30 to 40 minutes, or until the top is golden and a toothpick inserted in the center comes out with a few moist crumbs but no wet batter. If the edges brown too quickly, tent the pan loosely with foil for the last few minutes of baking.
- Place the pan on a cooling rack and let the cake cool for at least 20 to 30 minutes. If you used parchment, lift the cake out of the pan using the overhang. Slice into squares and serve slightly warm or at room temperature.
Notes
Approximate per serving, based on 12 servings: 320 calories; fat 15 g; saturated fat 3 g; carbohydrates 43 g; fiber 1 g; sugars 26 g; protein 4 g; sodium 230 mg. Values are estimates and will vary based on brands, optional mix-ins, and portion size.
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