Zucchini Coffee Cake Recipe tastes like a super moist cinnamon crumb cake that secretly packs in veggies without anyone noticing. It works perfectly for busy families, brunch lovers, and anyone who wants a cozy treat on the table in about 1 hour and 10 minutes. I baked a version of this for my neighbors last summer, and they still bring it up every time zucchini season rolls around.

Why Make This Zucchini Coffee Cake Recipe at Home

You get a tender, bakery-style crumb cake with a thick cinnamon streusel and a hint of warm spice in every bite. The zucchini keeps the cake incredibly moist, so it stays soft for days without drying out.

You also control the sweetness, the amount of streusel, and the spices, which grocery store versions never quite nail. Plus, this recipe uses basic pantry ingredients and one bowl for the batter, so cleanup stays painless.

“This Zucchini Coffee Cake Recipe tastes like a fancy bakery treat, but my kids devoured it for breakfast and had no clue they ate vegetables. ★★★★★”

Ingredients You Need

Dry ingredients

All-purpose flour, 2 cups, spooned and leveled
Baking powder, 1 ½ teaspoons
Baking soda, ½ teaspoon
Fine sea salt, ½ teaspoon
Ground cinnamon, 2 teaspoons
Ground nutmeg, ¼ teaspoon (optional but adds cozy flavor)

I prefer King Arthur or Gold Medal flour because they give consistent texture. Use regular all-purpose flour, not self-rising.

Wet ingredients

Large eggs, 2, at room temperature
Granulated sugar, ¾ cup
Light brown sugar, ¼ cup, packed
Neutral oil, ½ cup (canola, vegetable, or light olive oil)
Plain Greek yogurt or sour cream, ½ cup
Vanilla extract, 2 teaspoons

Greek yogurt adds tang and tenderness. Sour cream works exactly the same if that sits in your fridge already. You can swap half the oil for unsweetened applesauce if you want a slightly lighter cake.

Zucchini

Fresh zucchini, 2 cups finely grated (about 2 medium zucchini)

Use firm, glossy zucchini with no mushy spots. You do not need to peel it. The green flecks look pretty in the cake and stay very subtle in flavor.

Streusel topping

All-purpose flour, 1 cup
Light brown sugar, ½ cup, packed
Granulated sugar, ¼ cup
Ground cinnamon, 1 ½ teaspoons
Fine sea salt, ¼ teaspoon
Cold unsalted butter, ½ cup (1 stick), cut into small cubes

Cold butter gives big, chunky crumbs. If you only have salted butter, use it and cut the added salt in the streusel in half.

Optional glaze

Powdered sugar, ¾ cup
Milk or half-and-half, 1–2 tablespoons
Vanilla extract, ½ teaspoon

This simple vanilla glaze adds a bakery-style finish. You can skip it if you want a less sweet breakfast-style cake.

Equipment

9 x 13 inch baking pan (metal or glass)
Parchment paper for easy removal
Two medium mixing bowls and one large mixing bowl
Whisk and rubber spatula
Box grater or food processor with grating disc
Measuring cups and spoons
Cooling rack

Tips & Mistakes

Squeeze the zucchini gently, not aggressively, or the cake turns dry instead of moist.
Measure flour by spooning it into the cup and leveling, since scooping packs it and makes the cake dense.
Use room temperature eggs and yogurt so the batter mixes smoothly and bakes evenly.
Do not overmix the batter; stir just until no dry streaks remain to keep the crumb tender.
Keep the butter cold for the streusel so you get chunky crumbs instead of a sandy layer.
Spread the batter evenly in the pan, or the cake bakes unevenly and domes too much on one side.
Check doneness with a toothpick near the center; pull the cake out when only a few moist crumbs cling.
Let the cake cool at least 20 to 30 minutes before slicing so it sets and cuts cleanly.

How to Make Zucchini Coffee Cake Recipe

Step 1: Prep the pan and oven

Preheat your oven to 350°F. Line a 9 x 13 inch pan with parchment and leave a little overhang on the long sides so you can lift the cake out later. Lightly grease the parchment and sides of the pan with butter or nonstick spray.

Step 2: Grate and prep the zucchini

Wash and dry the zucchini. Grate it on the small or medium holes of a box grater. Place the grated zucchini in a clean kitchen towel or several layers of paper towel and gently squeeze out excess moisture until it feels damp but not dripping.

Step 3: Mix the streusel topping

In a medium bowl, combine flour, brown sugar, granulated sugar, cinnamon, and salt. Add the cold butter cubes. Use your fingers or a pastry cutter to work the butter into the dry ingredients until you see pea-sized clumps and some sandy bits.

Place the streusel in the fridge while you mix the cake batter. Chilling helps the crumbs hold their shape in the oven.

Step 4: Combine the dry ingredients

In a large bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and nutmeg. Break up any lumps so the leavening distributes evenly. Set this bowl aside.

Step 5: Mix the wet ingredients

In another medium bowl, whisk the eggs until smooth. Add granulated sugar and brown sugar and whisk until the mixture looks slightly thick and lighter in color.

Whisk in the oil, yogurt or sour cream, and vanilla extract until the mixture looks smooth and glossy. Scrape the sides of the bowl so everything combines well.

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 you see only a few small flour streaks.

Add the grated zucchini and fold again until it distributes evenly and no dry spots remain. The batter looks thick but spreadable.

Step 7: Assemble in the pan

Spread the batter into the prepared pan and smooth the top with a spatula. Take the chilled streusel from the fridge and sprinkle it evenly over the batter. Press the crumbs very lightly into the surface so they stick without sinking.

Step 8: Bake

Place the pan on the center rack of the oven. Bake 35 to 45 minutes, depending on your oven and pan type. Start checking at 35 minutes by inserting a toothpick into the center; pull the cake out when the toothpick comes out with a few moist crumbs but no wet batter.

If the top browns too quickly, tent the pan loosely with foil for the last 5 to 10 minutes.

Step 9: Cool and glaze

Set the pan on a cooling rack and let the cake cool at least 20 to 30 minutes. If you plan to glaze it, whisk powdered sugar, vanilla, and 1 tablespoon milk in a small bowl. Add more milk, a few drops at a time, until you get a thick but pourable consistency.

Drizzle the glaze over the slightly warm cake in zigzags or thin lines. Let the glaze set for about 10 minutes, then slice and serve.

Variations I've Tried

Chocolate chip version: Fold ½ to ¾ cup mini chocolate chips into the batter with the zucchini. Kids treat it like dessert, and it tastes amazing slightly warm.
Nutty streusel: Add ½ cup chopped walnuts or pecans to the streusel for crunch and a toasty flavor. Toast the nuts lightly first for extra depth.
Whole wheat twist: Swap ½ cup of the all-purpose flour for white whole wheat flour. The cake still tastes soft and tender, with a slightly heartier flavor.
Cinnamon swirl layer: Spread half the batter in the pan, sprinkle a mixture of ¼ cup brown sugar and 1 teaspoon cinnamon over it, then add the rest of the batter and the streusel. This gives a pretty cinnamon ribbon through the middle.

How to Serve Zucchini Coffee Cake Recipe

Serve slices slightly warm or at room temperature with hot coffee, tea, or a cold glass of milk. Add a dollop of vanilla yogurt on the side if you want a brunch-style plate. Kids love small squares tucked into lunchboxes as a sweet surprise. You can also cut the cake into bite-size cubes and serve it on a platter for brunch buffets or baby showers.

How to store

Let the cake cool completely, then cover the pan tightly or transfer slices to an airtight container and keep at room temperature for up to 3 days.
Store in the fridge for up to 5 days if your kitchen runs warm, and bring slices to room temperature before serving for best texture.
Freeze individual slices 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 in a 300°F oven for 5 to 8 minutes until just warm and soft again.