America's Test Kitchen Zucchini Bread Recipe: Moist Crumb With Walnut Swirls and Spiced Zest

America's Test Kitchen zucchini bread recipe delivers that perfect balance of moist crumb and warm spices that makes it a year-round favorite. The secret lies in the precise ratio of grated zucchini to flour—too much liquid makes it dense, but this method gets it just right.

I've baked countless loaves, and this version consistently wins for its tender texture and subtle sweetness that lingers without overpowering.

What sets this apart is the walnut swirl and spiced zest that transform ordinary zucchini bread into something special. The walnuts add satisfying texture, while the citrus zest brightens every bite.

Baking at a precise temperature ensures a golden crust without drying out the interior—no more sad, rubbery loaves. The recipe also includes a foolproof method for testing doneness that actually works.

By the time it emerges from the oven, you'll have a loaf with a moist crumb that's dense but not heavy, flecked with toasted walnuts and punctuated by bursts of citrus. The aroma alone will have everyone gathering in the kitchen.

This isn't just zucchini bread—it's a showstopping side dish that pairs beautifully with breakfast meats or stands alone with a pat of butter.

The best part? It keeps well for days, making it perfect for meal prep. Whether you're serving it warm from the oven or slicing it for lunches, this recipe delivers professional-quality results every time. Let's get baking—your kitchen will smell amazing in just under an hour.

Ingredients for america's test kitchen zucchini bread

These 14 ingredients create the perfect moist zucchini bread with walnut swirls and citrus zest.

The zucchini is key here—grate it fresh and squeeze out all the moisture with a clean towel. Local farmers markets often have the freshest zucchini, but any firm, medium-sized ones from the grocery store work too. Walnuts should be toasted in a dry pan for 5 minutes before chopping—they add incredible flavor. For the zest, grab a bright orange and use a microplane to get fine, fragrant strips. The butter? Full-fat is non-negotiable—it keeps the crumb tender and rich. I always buy mine from Whole Foods or the bakery section at Trader Joe's.

No walnuts? Pecans or almonds work in a pinch, but toast them first. Short on zucchini? Yellow squash grated the same way gets you close. The baking soda is critical—don't use baking powder. For the sugars, I prefer white over brown for a cleaner flavor, but the brown adds that subtle caramel note. If you're feeling fancy, swap the vanilla extract for vanilla bean paste—it's worth the extra cost. The citrus zest can be from lemon or lime too, but orange gives that signature brightness.

This bread keeps beautifully wrapped in plastic for 3 days at room temperature or 1 week in the fridge. For longer storage, slice and freeze portions—perfect for quick breakfasts. The walnut swirl stays fresh for 5 days if you keep the bread sealed tight. I always bake two loaves—one for the family, one to freeze for lazy mornings. The aroma while baking? Game-changer—your whole house will smell amazing.

Step-by-step instructions for america's test kitchen zucchini bread

This is the exact method that delivers that signature moist crumb and perfect walnut swirl—every time.

Start by grating the 2 cups zucchini using the large holes of a box grater. Press the grated zucchini into a clean kitchen towel and squeeze out all the excess moisture—this is critical for that moist crumb without making the bread dense. In a small bowl, combine the 1 cup chopped walnuts with 1 tablespoon orange zest and set aside. Here's the thing—toasting the walnuts first would be amazing, but we're keeping this method simple and focused on that signature texture.

While you're squeezing the zucchini, take a moment to toast the walnuts if you're feeling fancy. Spread them on a baking sheet and toast in a 350°F oven for 8-10 minutes until fragrant. Cool completely before mixing with the orange zest. This step adds depth of flavor that really makes the bread special.

In a large mixing bowl, combine the 1 cup unsalted butter (make sure it's 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 know it's ready when the mixture nearly doubles in volume and leaves faint streaks on the sides of the bowl. This creaming process incorporates air, which creates that tender crumb we're after.

Here's where it gets fun—add the 2 whole large eggs one at a time, mixing well after each addition. Then stir in the 1 tablespoon vanilla extract. The mixture should be smooth and slightly thick. If it looks too thin, don't worry—we'll fix that in the next step. This is the foundation that makes the bread moist and flavorful.

In a separate bowl, whisk together the 2.5 cups all-purpose flour, 1.5 teaspoons ground cinnamon, 0.5 teaspoon ground nutmeg, 0.5 teaspoon ground ginger, 0.5 teaspoon salt, and 1.5 teaspoons baking soda. Sift the flour mixture directly into the wet ingredients and mix on low speed just until combined—about 30 seconds. Overmixing develops gluten, which can make the bread tough.

Add the squeezed zucchini and mix on low speed until just incorporated. The batter will be thick and slightly sticky, almost like cookie dough. This is perfect—it means we've got the right moisture balance. Fold in the walnut-orange zest mixture using a spatula, being careful not to overmix. The batter should hold its shape when you spoon it out.

Preheat your oven to 350°F and grease a 9x5-inch loaf pan with butter or line it with parchment paper. Spoon about ⅔ of the batter into the prepared pan and smooth the top with a spatula. Drop spoonfuls of the remaining batter on top, then use the tip of a knife to swirl the batter into the bottom layer. This creates those beautiful walnut swirls that make this bread so special.

Bake for 50-60 minutes or until a toothpick inserted in the center comes out clean. The top should be golden brown, and the bread should pull away slightly from the sides of the pan. If the top browns too quickly, tent the pan with foil. Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely. This resting time is crucial—it allows the bread to set properly and prevents it from falling apart when you slice it.

Once the bread has cooled completely, slice it into 8 equal pieces using a serrated knife. The internal texture should be moist and tender with a slight crumb, and those walnut swirls should be visible throughout. Serve warm for the ultimate experience—each slice will be packed with flavor from the cinnamon, nutmeg, and ginger, balanced by the sweetness of the sugars and the nutty crunch of the walnuts.

This bread keeps well at room temperature for 2-3 days or can be frozen for up to 3 months. For extra moisture, brush the top with simple syrup or wrap tightly in plastic wrap. Enjoy it plain, with a smear of butter, or paired with your favorite tea or coffee. Trust me, this is the zucchini bread you'll want to make again and again!

Perfect pairings for these flavors

Breakfast Pairings

This zucchini bread shines brightest at breakfast, especially with crispy sausage patties or bacon strips—the salty-sweet contrast is unbeatable. I like to serve thick slices alongside scrambled eggs and a dollop of sour cream, or pair it with turkey sausage for a lighter option.

The walnut swirl adds satisfying texture that complements fluffy pancakes too. 🥓

Afternoon Tea Pairings

Elevate your tea time with this bread as the star. A steaming cup of Earl Grey or chamomile tea lets the warm spices in the bread truly sing. For a coffee twist, try it with cold brew or lavender-infused latte—the nutty crunch balances the bitterness beautifully.

I often add a thin layer of whipped cream and a sprinkle of orange zest to match the bread's flavor profile.

Sweet Spreads

While butter is classic, don't be afraid to experiment with spreads. Almond butter adds richness, while cream cheese with a touch of honey creates a tangy-sweet combo. For something decadent, try dark chocolate ganache drizzled over slices.

I also love pairing it with peanut butter for a nostalgic flavor that works surprisingly well with the citrus notes. 🍯

Wine Pairings

Yes, wine with bread! A dry Riesling from Germany enhances the citrus zest and balances the sweetness perfectly. For red wine lovers, a Pinot Noir with its bright acidity complements the spices without overpowering.

I've also enjoyed it with sparkling rosé—the bubbles cleanse the palate between bites, making each slice taste fresh.

Coffee Pairings

This bread is a coffee lover's dream. A bold espresso brings out the nutmeg and cinnamon notes, while a vanilla latte mirrors the extract in the recipe. For something different, try it with chicory coffee—the earthy flavors create an interesting contrast. I always

Seasonal Variations

In summer, serve it with fresh berries and whipped cream for a light dessert. During holidays, pair it with spiced apple butter and sharp cheddar for a savory twist. I once served it with pumpkin spice latte in fall—absolute perfection. The versatility makes this bread a year-round favorite that adapts to any season's flavors. 🍂

Frequently asked questions