Desserts
The America's Test Kitchen zucchini bread recipe delivers the perfect balance of moist crumb, warm spices, and rich walnut swirls—every slice is a revelation. 🌟 What sets this apart is the precise technique for grated zucchini (not spiralized) to control moisture while keeping the texture tender.
I’ve tested countless variations, and this method consistently yields bread that’s dense yet light, with a subtle sweetness that lingers.
This recipe marries classic zucchini bread with refined baking science: a touch of sour cream for richness, cinnamon and nutmeg for depth, and a walnut swirl that adds texture without overpowering.
The secret to the moist crumb lies in the ratio of flour to zucchini—too much liquid and it becomes gummy; too little and it dries out. I’ve perfected the balance so every batch turns out consistently tender.
By the time it emerges from the oven, you’ll have a loaf with a golden crust, a crumb so soft it melts in your mouth, and pockets of caramelized walnuts throughout.
The aroma of warm spices fills the kitchen, making it impossible to wait for cooling. It’s the kind of bread that disappears in slices, perfect for breakfast, snacks, or gifts.
Whether you’re a seasoned baker or new to zucchini bread, this recipe is foolproof—just follow the steps, and you’ll achieve restaurant-quality results at home. Let’s get started on a loaf that’ll become your new favorite.
Ingredients for america's test kitchen zucchini bread
Here's what transforms your pantry into that perfect moist zucchini bread with walnut swirls.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 2 ½ cups | Sifted for even texture |
| Granulated Sugar 🍚 | 1 ½ cups | Light brown sugar works too |
| Packed Brown Sugar 🍚 | ½ cup | For subtle caramel notes |
| Unsalted Butter 🧈 | 1 cup | Room temperature, full-fat |
| Large Eggs 🥚 | 2 whole | Room temperature preferred |
| Sour Cream 🥛 | ½ cup | Full-fat for richness |
| Vanilla Extract 🌿 | 1 tbsp | Pure vanilla preferred |
| Medium Zucchini 🥒 | 2 whole | Grated, excess drained |
| Ground Cinnamon 🌶️ | 1 ½ tsp | Freshly ground preferred |
| Ground Nutmeg 🌶️ | ½ tsp | Freshly grated nutmeg |
| Ground Ginger 🌶️ | 1 tsp | Freshly ground preferred |
| Salt 🧂 | ½ tsp | Diamond Crystal kosher |
| Walnuts 🥜 | 1 ½ cups | Toasted and chopped |
| Baking Soda 🧪 | 1 tsp | Freshly measured |
| Baking Powder 🧪 | ½ tsp | Double-acting preferred |
The zucchini is non-negotiable for moisture, but medium-sized is key—too big and it gets watery. Trader Joe's has the best pre-grated zucchini in a bag, but if using whole, grate it yourself and squeeze out excess liquid with a clean towel. Walnuts? Costco sells them cheaper by the pound, but any store brand works. Toast them first—just 5 minutes in a dry pan—so they add nuttiness, not blandness. The spices are where magic happens: Penzeys sells pre-ground cinnamon and nutmeg blends if you're not into measuring separately.
No sour cream? Plain Greek yogurt at half the amount works in a pinch. Brown sugar out of stock? White sugar plus 1 tbsp molasses mimics the flavor. Walnuts too pricey? Pecans or almonds swap one-for-one, though texture changes slightly. The baking powder and soda are critical—don't use baking powder alone. For extra moisture, add 1 tbsp unsweetened applesauce to the wet ingredients. And if your kitchen's humid, reduce the zucchini by half a cup to avoid a gummy loaf.
Pre-grated zucchini keeps for 3 days in the fridge, but whole zucchini lasts 1 week. Toasted walnuts stay fresh for 2 weeks in an airtight container. The dough keeps for 24 hours covered in the fridge—perfect for shaping the next morning. For the walnut swirl, mix 1 cup chopped walnuts with 1 tbsp melted butter and chill until firm. Once baked, store the loaf wrapped in foil for 3 days or freeze slices for 3 months
Why You'll Love This Recipe
- No-Fuss Mixing: The dough comes together in one bowl—no stand mixer, no fuss. Just creamed butter, sugars, and eggs, then fold in that grated zucchini (strained if you’re impatient). Honestly, I’ve made it while waiting for coffee to brew.
- Moisture Magic: That combo of brown sugar and butter keeps it tender for days—no dry, sad zucchini bread here. The eggs add structure, so it doesn’t crumble, and the sugars caramelize just enough for a subtle depth. Between us, it’s the kind of bread that disappears faster than my willpower.
- Breakfast to Snack: Slice it warm with butter for a quick breakfast, or pack it in lunchboxes—kids love the mild sweetness. I’ve even tossed chunks into salads when I’m lazy. It’s the ultimate “make once, use twice” loaf.
Step-by-step instructions for america's test kitchen zucchini bread
Here's how to bake the perfect loaf with a moist crumb and walnut swirls every time.
👨🍳 Step 1: Prep the Zucchini and Toast the Walnuts
Start by grating the 2 whole medium zucchini using the large holes of a box grater. Place the grated zucchini in a clean kitchen towel and squeeze out all the excess moisture—this prevents a gummy texture. I press down firmly and twist the towel to wring out every last drop.
While the zucchini drains, toast the 1.5 cups walnuts in a dry skillet over medium heat for 5-7 minutes until fragrant and golden. Watch them closely—they burn quickly. Let them cool slightly, then chop them coarsely. Set aside for the swirl. The toasting deepens their flavor and makes them crunchier in the finished bread.
👨🍳 Step 2: Cream Butter and Sugars Together
In a large mixing bowl, combine the 1 cup unsalted butter (room temperature) with the 1.5 cups granulated sugar and 0.5 cup packed brown sugar. Beat with an electric mixer on medium speed for 3-4 minutes until light and fluffy. You'll see the mixture nearly double in volume and become pale in color.
This creaming process incorporates air, which creates a tender crumb. I like to scrape down the sides of the bowl every 30 seconds to ensure even mixing. If your butter isn't quite room temperature, let it sit at room temperature for another 10 minutes before starting.
👨🍳 Step 3: Mix Wet Ingredients and Combine
Add the 2 whole large eggs (room temperature preferred) one at a time, mixing well after each addition. Then stir in the 0.5 cup sour cream and 1 tbsp vanilla extract. The mixture should be smooth and slightly thickened. In a separate bowl, whisk together the 2.5 cups all-purpose flour, 1.5 tsp ground cinnamon, 0.5 tsp ground nutmeg, 1 tsp ground ginger, 0.5 tsp salt, 1 tsp baking soda, and 0.5 tsp baking powder.
Gradually add the dry ingredients to the wet mixture, mixing on low speed just until combined. Be careful not to overmix—stop as soon as the flour disappears. Then fold in the drained zucchini and half of the toasted walnuts using a spatula. The batter will be thick but manageable. If it seems too dry, add 1-2 tablespoons of milk (not listed in ingredients) to help bind it.
🥘 Step 4: Create the Walnut Swirl and Bake
Preheat your oven to 350°F and grease a 9x5-inch loaf pan thoroughly with butter or nonstick spray. Spread half of the batter into the prepared pan. Sprinkle the remaining toasted walnuts evenly over the batter, then spread the remaining batter on top. Use the back of a spoon to create gentle swirls in the walnuts for a marbled effect.
Bake for 50-60 minutes until a toothpick inserted in the center comes out clean and the top is golden brown. Here's the thing—your oven might run hot, so start checking at the 50-minute mark. If the top browns too quickly, tent loosely with foil after 30 minutes. The bread is done when it springs back slightly when pressed in the center.
⏰ Step 5: Cool and Enjoy
Remove the bread from the oven and let it cool in the pan for 10 minutes. Then transfer it to a wire rack to cool completely. This resting period is crucial—it allows the moisture to distribute evenly and prevents a gummy texture. I know it's tempting to slice into warm bread, but patience here makes all the difference.
Once fully cooled, slice the bread into 1-inch pieces. Each slice should have a moist crumb with pockets of walnut swirls throughout. Store leftovers wrapped tightly at room temperature for up to 3 days, or freeze for up to 3 months. The flavors actually improve as it sits, developing deeper spice notes over time.
Pro Tips For Making America'S Test Kitchen Zucchini Bread
- MEASURE BUTTER COLD: The recipe calls for softened butter, but not melted—think "yielding when pressed, not greasy." I learned this the hard way when my first batch turned out dense. If your kitchen’s warm, pop the butter in the fridge for 10 minutes mid-softening. The butter’s fat needs to stay solid enough to create those tender crumb pockets.
- GRATE ZUCCHINI DRY: No one likes soggy bread, and excess moisture is the enemy. After grating, wrap the zucchini in a clean kitchen towel or paper towels and squeeze out every last drop—yes, even if it feels excessive. The recipe’s magic relies on balance, and wet zucchini throws that off faster than you’d think.
- DON’T OVERMIX: Once you fold in the wet ingredients, stop stirring after just 10-12 strokes. I used to think more mixing = better blending, but this recipe is delicate. Overmixing develops the gluten, and suddenly you’ve got a tough loaf instead of the moist, tender crumb you’re after. Stir until just combined, then let the batter rest.
- BAKE UNTIL 190°F: The recipe says "until a tester comes out clean," but here’s the real test: aim for an internal temp of 190°F at the center. I used to pull loaves too soon, thinking they were done, only to have them collapse later. A meat thermometer saves guesswork—wait for that temp, even if the tester looks mostly clean. (Your future self will thank you.)
Perfect pairings for this recipe
Morning Coffee Pairings
Start your day with a slice of warm zucchini bread paired with a rich cold brew coffee or a vanilla latte—the cinnamon and nutmeg flavors in the bread complement the coffee's depth beautifully.
I love using Starbucks Pike Place Roast for its balanced acidity, or a local craft cold brew if you prefer something smoother. The walnut swirl adds a satisfying crunch that contrasts perfectly with the creamy coffee. ☕
Afternoon Tea Elevation
Transform your afternoon tea with this bread by serving it alongside Earl Grey tea and a dollop of clotted cream. The bergamot notes in the tea enhance the warm spices in the zucchini bread, while the cream adds a luxurious touch.
For a non-alcoholic option, try sparkling apple cider—the effervescence cuts through the richness of the walnuts and butter. 🍵
Dessert with Ice Cream
Turn a slice into a decadent dessert by pairing it with vanilla bean ice cream or maple walnut ice cream (for an extra layer of flavor harmony). The warm spices in the bread contrast beautifully with the cool creaminess of the ice cream.
I also love adding a drizzle of honey or caramel sauce to tie everything together. This combo feels like a cozy autumn treat. 🍦
Wine Pairings for Evening
If you're enjoying this bread in the evening, a dry Riesling or Gewürztraminer pairs wonderfully with its spiced flavors. The slight sweetness and acidity in these wines balance the richness of the walnuts and butter.
For a red option, a Pinot Noir with its earthy notes complements the bread's depth without overpowering it. 🍷
Breakfast with Yogurt
For a lighter breakfast, serve a slice with Greek yogurt and a drizzle of local honey. The tanginess of the yogurt brightens the sweetness of the bread, while the honey adds a touch of natural sweetness.
Top with a sprinkle of granola for extra crunch. This combo is perfect for a quick, satisfying morning meal. 🥛
Spiced Beverage Match
Warm up with a chai latte or mulled apple cider alongside your zucchini bread. The spices in these drinks—cinnamon, cardamom, and cloves—echo the flavors in the bread, creating a cohesive and comforting experience.
A sprinkle of cinnamon on top of the bread before serving adds an extra layer of warmth. 🍂
Nutrition facts
Frequently asked questions
Why does this recipe use grated zucchini instead of spiralized?
Grated zucchini releases less moisture than spiralized, preventing a gummy texture. The fine shreds distribute evenly throughout the batter, while spiralized zucchini creates pockets of excess liquid that can make the bread dense. For best results, always drain the grated zucchini thoroughly before mixing.
Can I substitute walnuts with another nut or seed?
Yes! Try pecans or almonds for a similar texture, or pumpkin seeds for a nut-free option. Toast all nuts/seeds first to enhance flavor. Just note that pecans add a slightly sweeter note, while seeds provide a different crunch. Adjust the amount to 1.5 cups total regardless of type.
How do I fix if my zucchini bread turns out too dense?
Density usually means too much zucchini moisture or overmixing. Next time, reduce grated zucchini by 0.5 cup or add 1-2 tbsp flour to absorb excess liquid. Also ensure you're not overmixing the batter—stop as soon as the flour disappears. For existing dense bread, try slicing thinner (0.5-inch) and toasting lightly to improve texture.
What's the best way to store leftovers?
Wrap cooled slices tightly in plastic wrap or store in an airtight container. At room temperature, it keeps for 3 days. For longer storage, freeze slices for up to 3 months. Thaw at room temperature or warm in a 300°F oven for 5-10 minutes to restore freshness. The walnut swirls stay crisp even after freezing!
Can I make this gluten-free?
Yes, but with adjustments. Replace all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill) and add 0.5 tsp xanthan gum. You may need to reduce zucchini by 0.25 cup since gluten-free flours absorb differently. Also expect slightly denser texture—gluten-free bread benefits from extra moisture. Test with a small batch first.