Cinnamon Sugar Zucchini Coffee Cake

Cinnamon Sugar Zucchini Coffee Cake tastes like a mashup of snickerdoodle, crumb cake, and the most tender zucchini bread you ever met. It works perfectly for relaxed weekend brunch, afternoon coffee, or a make-ahead breakfast, and it usually takes about 1 hour from start to finish. I tested this on a sleepy Sunday in my Minnesota kitchen while my kid asked if cake for breakfast counts as a vegetable.

Why Cinnamon Sugar Zucchini Coffee Cake Is Worth It

This coffee cake stays incredibly moist from the shredded zucchini, but the cinnamon sugar ribbon and crunchy topping keep every bite sweet and cozy. You get that classic coffee cake crumb with a subtle veggie boost that no one spots unless you brag about it.

The recipe uses simple pantry ingredients and does not need a mixer, so you can stir it together before your coffee finishes brewing. It also freezes well, which means future you gets a homemade breakfast without lifting a finger.

“Soft, cinnamon swirled, and secretly loaded with zucchini, this coffee cake tastes like a bakery treat that somehow landed in your own kitchen. ★★★★★”

Ingredients You Need

Dry ingredients

• All purpose flour
• Granulated sugar
• Light brown sugar
• Baking powder
• Baking soda
• Fine sea salt
• Ground cinnamon
• Ground nutmeg (optional but adds cozy flavor)

Wet ingredients

• Large eggs
• Neutral oil such as canola, vegetable, or light olive oil
• Whole milk or 2 percent milk
• Plain Greek yogurt or sour cream
• Vanilla extract

Zucchini

• Fresh zucchini, grated on the small or medium holes of a box grater
  • No need to peel
  • Pat very lightly with a towel if extremely wet, but keep some moisture so the cake stays tender

Cinnamon sugar filling and topping

• Granulated sugar
• Ground cinnamon
• A pinch of salt
• Melted butter for the topping
• Optional: chopped pecans or walnuts for extra crunch

Pantry shortcuts and brand notes

• Use store brand flour, sugar, and oil without any problem in this recipe.
• Use any neutral oil you already keep on hand to avoid a special trip.
• Use full fat Greek yogurt or sour cream for the best texture, but low fat versions still work.
• Use pre ground cinnamon from your favorite brand, but choose a fresh jar so the flavor stays strong.

Equipment list

• 8 by 8 inch or 9 by 9 inch square baking pan
• Large mixing bowl
• Medium mixing bowl
• Small bowl for cinnamon sugar
• Whisk
• Rubber spatula or wooden spoon
• Box grater for zucchini
• Measuring cups and spoons
• Cooling rack
• Knife or offset spatula for spreading batter

Quick Tips & substitutions

• Squeeze only the very wet zucchini; keep some moisture so the cake does not turn dry.
• Use half whole wheat flour and half all purpose flour for a slightly heartier texture.
• Swap Greek yogurt with sour cream in equal amounts.
• Use coconut oil instead of neutral oil if you enjoy a light coconut note.
• Use almond milk or oat milk in place of dairy milk if needed, but keep the yogurt or sour cream for structure.
• Stir chopped nuts only into the topping so they stay crunchy.
• Line the pan with parchment and leave a sling so you lift the cake out easily.
• Let the cake cool at least 20 minutes before slicing so it holds its shape.

How to Make Cinnamon Sugar Zucchini Coffee Cake

Step 1: Prep the pan and oven

Preheat your oven to 350 degrees Fahrenheit. Grease your baking pan with butter or oil, then line it with parchment if you want easy removal. Set the pan aside while you mix the batter.

Step 2: Grate the zucchini

Wash the zucchini and trim the ends. Grate it on the small or medium holes of a box grater. Lightly gather the shreds in your hands and give one gentle squeeze over the sink if they drip a lot, then set the zucchini aside.

Step 3: Mix the cinnamon sugar filling and topping

In a small bowl, stir together granulated sugar, cinnamon, and a tiny pinch of salt. Scoop out about half of this mixture and reserve it for the center swirl. Add melted butter and optional chopped nuts to the remaining half to use as the crunchy 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. Break up any brown sugar clumps with your fingers or the whisk. Set this bowl aside.

Step 5: Whisk the wet ingredients

In a medium bowl, whisk the eggs until smooth. Add milk, yogurt or sour cream, oil, and vanilla, then whisk until the mixture looks creamy and fully combined. Stir in the grated zucchini until it distributes evenly.

Step 6: Bring the batter together

Pour the wet mixture into the bowl with the dry ingredients. Use a spatula to fold the batter gently until no dry streaks of flour remain. Scrape the bottom of the bowl to catch any hidden flour pockets, but stop mixing as soon as the batter looks uniform.

Step 7: Layer the batter and cinnamon sugar

Spread about half of the batter into the prepared pan and smooth the top. Sprinkle the reserved dry cinnamon sugar mixture evenly over this layer. Dollop the remaining batter on top in spoonfuls, then gently spread it to cover the cinnamon sugar.

Step 8: Add the topping

Sprinkle the buttery cinnamon sugar nut mixture over the surface of the batter. Try to cover the top evenly so every slice gets some crunchy topping. Gently tap the pan on the counter once to settle the batter.

Step 9: Bake

Place the pan in the center of the oven. Bake for 35 to 45 minutes, depending on your pan size and oven, until a toothpick inserted in the center comes out with a few moist crumbs but no wet batter. If the top browns too quickly, tent the pan loosely with foil during the last 10 minutes.

Step 10: Cool and slice

Set the pan on a cooling rack and let the coffee cake cool at least 20 to 30 minutes. Use the parchment sling to lift the cake out, or slice it directly in the pan. Cut into squares and serve warm or at room temperature.

Recipe Variations

• Gluten free: Use a 1 to 1 gluten free baking flour blend and add a tablespoon of cornstarch for extra tenderness.
• Dairy free: Use plant based milk and yogurt, and swap the butter in the topping with melted coconut oil or a neutral oil.
• Vegan: Use dairy free swaps plus two flax eggs or a commercial egg replacer that works in cakes.
• Low sugar: Cut the sugar in the batter by one third and use a lighter sprinkle of cinnamon sugar on top.
• Low carb style: Use a low carb baking blend and a granulated sweetener that measures like sugar, but expect a slightly different texture.
• Add ins: Stir in mini chocolate chips, chopped nuts, or a handful of shredded coconut to the batter.
• Spice twist: Add a pinch of cardamom or cloves with the cinnamon for a bakery style flavor.

Ways to Serve

• Serve warm slices with hot coffee or tea for breakfast.
• Pack squares in lunchboxes as a sweet snack.
• Top a warm piece with vanilla yogurt for a more filling morning meal.
• Pair with fresh berries or sliced fruit for a simple brunch spread.
• Cut into small cubes and serve on a brunch board with eggs and fruit.

Storage Success

Let the Cinnamon Sugar Zucchini Coffee Cake cool completely before you cover it. Store it at room temperature in an airtight container for up to 3 days, and slip in a piece of parchment so slices do not stick together. For longer storage, wrap individual squares and freeze them for up to 2 months, then thaw on the counter or warm in the microwave. The texture stays soft and tender, which makes this recipe perfect for baking ahead.

Cinnamon Sugar Zucchini Coffee Cake

Cinnamon Sugar Zucchini Coffee Cake tastes like a mashup of snickerdoodle, crumb cake, and tender zucchini bread. It’s perfect for weekend brunch, afternoon coffee, or a make-ahead breakfast.

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Prep Time 20 minutes mins

Cook Time 40 minutes mins

Total Time 1 hour hr

Servings: 9

Course: Breakfast

Cuisine: American

Ingredients

  

• 2 cups all purpose flour
• 1/2 cup granulated sugar
• 1/2 cup light brown sugar, packed
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon fine sea salt
• 2 teaspoons ground cinnamon
• 1/4 teaspoon ground nutmeg

• 2 large eggs
• 1/2 cup neutral oil (such as canola, vegetable, or light olive oil)
• 1/2 cup milk (whole or 2 percent)
• 1/2 cup plain Greek yogurt or sour cream
• 2 teaspoons vanilla extract

• 1 1/2 cups fresh zucchini, grated (no need to peel)

• 1/2 cup granulated sugar
• 2 teaspoons ground cinnamon
• 1 pinch salt
• 3 tablespoons melted butter
• 1/2 cup chopped pecans or walnuts

Instructions

 

1. Preheat the oven to 350°F (175°C). Grease an 8x8-inch or 9x9-inch baking pan with butter or oil, then line with parchment paper if desired for easy removal.
2. Wash the zucchini, trim the ends, and grate it on the small or medium holes of a box grater. If it seems extremely wet, give it one gentle squeeze over the sink, but keep some moisture so the cake stays tender. Set aside.
3. In a small bowl, stir together the granulated sugar, ground cinnamon, and a pinch of salt for the cinnamon sugar. Scoop out about half of this mixture and set it aside for the center swirl. Stir the melted butter and optional chopped nuts into the remaining half to make the crunchy topping.
4. In a large bowl, whisk together the flour, granulated sugar, brown sugar, baking powder, baking soda, salt, cinnamon, and nutmeg. Break up any clumps of brown sugar with your fingers or the whisk.
5. In a medium bowl, whisk the eggs until smooth. Add the oil, milk, yogurt or sour cream, and vanilla. Whisk until the mixture looks creamy and well combined, then stir in the grated zucchini until evenly distributed.
6. Pour the wet mixture into the dry ingredients. Use a spatula to gently fold the batter together just until no dry streaks of flour remain, scraping the bottom of the bowl to catch any hidden flour. Do not overmix.
7. Spread about half of the batter into the prepared pan and smooth the top. Sprinkle the reserved dry cinnamon sugar mixture evenly over this layer. Dollop the remaining batter on top in spoonfuls and gently spread it to cover the cinnamon sugar layer.
8. Sprinkle the buttery cinnamon sugar nut mixture evenly over the surface of the batter. Lightly tap the pan on the counter once to settle the batter and topping.
9. Bake for 35 to 45 minutes, depending on pan size and your oven, 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 top is browning too quickly, tent the pan loosely with foil during the last 10 minutes.
10. Set the pan on a cooling rack and let the coffee cake cool for at least 20 to 30 minutes. Use the parchment sling to lift it out of the pan or slice directly in the pan. Cut into squares and serve warm or at room temperature.

Notes

Nutrition Information
Approximate for 1 of 9 servings: 320–360 calories; fat 17–20 g; saturated fat 4–5 g; carbohydrates 40–45 g; fiber 1–2 g; sugars 24–28 g; protein 5–7 g; sodium 260–320 mg. Values will vary based on specific ingredients, add-ins (such as nuts), and portion size.

Storage: Let the cake cool completely, then store in an airtight container at room temperature for up to 3 days. For longer storage, wrap individual squares and freeze for up to 2 months; thaw at room temperature or warm briefly in the microwave before serving.