Peanut Butter Chocolate Chip Zucchini Bread

I discovered that peanut butter zucchini bread could be both deeply peanutty and pleasantly moist without feeling greasy the first time I tried to mash peanut butter into a quick-bread batter. This Peanut Butter Zucchini Bread kept a pronounced peanut flavor, a tender crumb from the grated zucchini, and just enough chocolate chips for little pockets of sweetness; I also tightened the method so you won’t end up with a soggy middle. If you want a dependable loaf that reads like a treat but sneaks in a veggie, this recipe will do the trick.

Why this peanut butter zucchini bread works

The key technique here is managing zucchini moisture while keeping a strong peanut butter presence. Zucchini adds water; too much and the center stays raw or gummy. I use two fixes: first, I grate the zucchini and lightly salt it to draw out excess water, then squeeze it dry; second, I slightly reduce the liquid ratio by using a mix of peanut butter and a single egg plus a splash of milk, which preserves tenderness without oversaturating the batter. I also tested baking times and found that a moderate oven of 350°F with an initial 50–60 minute bake produces a golden top and a set center for a standard 9×5 loaf pan.

During testing I initially used two eggs and skipped squeezing the zucchini; the loaf rose nicely but sank and remained slightly underbaked in the center. Reducing the eggs and removing extra water fixed both issues: the crumb stayed tender, the muffin-like crumb structure held, and the peanut flavor came through without the loaf feeling oily.

Key takeaways

• Squeeze grated zucchini to remove excess moisture so the loaf sets properly.
• Use creamy peanut butter and a single egg to keep richness without greasiness.
• Add chocolate chips sparingly so they create pockets of sweetness without weighing down the batter.

Ingredients you’ll need and what to substitute

You’ll need basic pantry staples plus zucchini and peanut butter. I use creamy peanut butter for an even texture; natural peanut butter can work but often separates, so stir it well and expect a slightly denser loaf. All-purpose flour gives structure; for a lighter loaf you can replace up to 1/3 cup with whole wheat pastry flour but expect a nuttier flavor and a slightly firmer texture. Brown sugar contributes both sweetness and moisture—use light or dark brown depending on how molasses-forward you want the bread.

Important ingredient notes and substitutions:

• Peanut butter: Use creamy for the most consistent texture; natural stirred peanut butter can be used but reduce added milk by 1 tablespoon if it seems very runny.
• Zucchini: Grate and squeeze; you can use yellow summer squash interchangeably in the same volume.
• Chocolate chips: Semi-sweet or dark work well; mini chips spread less and hold pockets of chocolate without making the batter heavy.
• Milk: Any 2% or whole milk is fine; for a dairy-free version use unsweetened almond milk but the crumb may be a touch looser.

Equipment

Essential tools are minimal: a 9×5-inch loaf pan gives the right loaf shape and depth; a box grater or stand-mixer shredder attachment for zucchini; a medium mixing bowl and a rubber spatula. I tested the recipe in a standard home oven and recommend using an oven thermometer if yours runs hot or cool. If you don’t have a 9×5 loaf pan, a 8×4-inch pan will work but reduce bake time by about 10 minutes and watch for doneness.

• 9×5-inch loaf pan
• Box grater or food processor shredder
• Mixing bowl and rubber spatula
• Oven thermometer (optional but helpful)

How to make peanut butter zucchini bread

Prep the zucchini and wet ingredients

Start by preheating the oven to 350°F and lining a 9×5-inch loaf pan with parchment or lightly greasing it. Grate 2 medium zucchinis (you want about 2 cups packed grated). Put the grated zucchini in a clean kitchen towel or several layers of paper towels, sprinkle a pinch of salt, wrap, and squeeze until most of the liquid is removed—this takes 20–30 seconds. In a medium bowl whisk together 1 cup creamy peanut butter, 1/2 cup granulated sugar, 1/2 cup packed light brown sugar, 1 large egg, and 1/4 cup milk until smooth; the batter will be thick but pourable. Stir in 1 teaspoon vanilla extract.

Mix dry ingredients and combine

In a separate bowl whisk 1 3/4 cups all-purpose flour, 1 teaspoon baking powder, 1/2 teaspoon baking soda, 1/2 teaspoon fine salt, and 1/2 teaspoon ground cinnamon. Fold the dry ingredients into the peanut-butter mixture until just combined—don’t overmix. Gently fold in the squeezed grated zucchini and 1/2 cup chocolate chips. The batter should be thick but spreadable; if it seems extremely stiff, stir in up to 1 tablespoon more milk.

Bake and test for doneness

Spread the batter evenly into the prepared loaf pan and smooth the top. Bake at 350°F on the center rack for 50–60 minutes. Start checking at 50 minutes: a toothpick inserted into the center should come out with a few moist crumbs but not wet batter; the top will be lightly cracked and golden. If the top is browning too quickly before the center is set, tent lightly with foil. Once done, remove the loaf to a wire rack and let it cool in the pan for 10 minutes, then lift out using the parchment and cool another 30 minutes before slicing—this resting lets the crumb finish setting so slices aren’t gummy.

Things I learned the hard way

• Don’t skip squeezing the zucchini: raw zucchini water is the main reason quick breads end up soggy in the center.
• Too much peanut butter can make the loaf greasy; stick to the listed 1 cup and use a single egg to streamline structure.
• Using mini chocolate chips prevents big chocolate pockets that can make slices collapse when still warm.
• If your oven runs hot, lower the temperature by 15°F and extend bake time—I had one oven that browned the crust too fast, and lowering the temp by 15°F produced a better set center.
• First attempt failure: my first loaf sank after using two eggs and no zucchini squeeze; reducing the eggs and squeezing fixed the collapse problem.

Variations to try

• Peanut Butter Swirl: Reserve 2 tablespoons of the peanut butter, thin with 1 teaspoon milk, drop on top of the batter and swirl with a skewer before baking—no time change required.
• Nutty Crunch: Fold in 1/3 cup chopped roasted peanuts for texture; because peanuts add fat and crunch, check for doneness at the usual time.
• Banana-Peanut Butter Zucchini Bread: Replace 1/2 cup of the milk with 1/2 cup mashed ripe banana for extra sweetness and moisture; bake the same time but watch center for doneness as banana increases moisture slightly.

Storage, freezing, and reheating

Store the cooled loaf wrapped tightly in plastic wrap or in an airtight container at room temperature for up to 3 days. For longer storage, wrap the whole loaf in plastic and foil and freeze for up to 3 months; thaw overnight in the refrigerator or on the counter for a few hours. For individual slices, reheat gently in a 300°F oven for 8–10 minutes or microwave a single slice for 12–18 seconds—microwave times vary. Expect the crumb to firm up after refrigeration; briefly warming restores tenderness and brings back peanut aroma.

What to serve with peanut butter zucchini bread

This loaf is great for breakfast, snack, or a light dessert. Pair it with plain Greek yogurt for a protein boost, a dollop of whipped cream for dessert, or a hot cup of coffee. Other natural companions are a simple fruit salad, honeyed cottage cheese, or a bowl of sliced apples for dipping.

Peanut Butter Chocolate Chip Zucchini Bread

A moist quick loaf where creamy peanut butter and grated zucchini make a tender, lightly sweet bread studded with chocolate chips—perfect for breakfast or snacks.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 55 minutes mins

Total Time 1 hour hr 45 minutes mins

Servings: 10 slices

Calories: 320

Ingredients Equipment Method Notes

Ingredients

  

• 1 cup creamy peanut butter
• 1/2 cup granulated sugar
• 1/2 cup packed light brown sugar
• 1 large egg
• 1/4 cup milk 2% or whole
• 1 teaspoon vanilla extract
• 1 3/4 cups all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon fine salt
• 1/2 teaspoon ground cinnamon
• 2 cups grated zucchini about 2 medium, squeezed dry
• 1/2 cup semi-sweet chocolate chips

Optional

• 1/3 cup chopped roasted peanuts optional

Equipment

• 1 9x5-inch loaf pan
• 1 Box grater or food-processor shredder
• 1 Mixing bowl and rubber spatula
• 1 Wire cooling rack

Method

 

Prepare and preheat

1. Preheat the oven to 350°F and grease a 9x5-inch loaf pan or line with parchment; place a rack in the center of the oven.

Zucchini

1. Grate the zucchini and place it in a clean kitchen towel; sprinkle lightly with salt and squeeze firmly to remove excess water, then measure out 2 cups packed.

Wet ingredients

1. In a medium bowl whisk together the peanut butter, granulated sugar, brown sugar, egg, milk, and vanilla until smooth.

Dry ingredients

1. In a separate bowl whisk the flour, baking powder, baking soda, salt, and cinnamon until combined.

Combine and bake

1. Fold the dry ingredients into the wet mixture until just combined, then gently fold in the squeezed zucchini and the chocolate chips; if the batter is extremely thick, add up to 1 tablespoon more milk.
2. Spread the batter into the prepared loaf pan and bake at 350°F for 50–60 minutes until the top is golden and a toothpick inserted in the center comes out with a few moist crumbs but not wet batter; tent with foil if the top browns too quickly.
3. Cool in the pan on a wire rack for 10 minutes, then remove the loaf and cool an additional 30 minutes before slicing.

Notes

Squeeze the grated zucchini well—this prevents a soggy center. If using natural peanut butter, stir thoroughly and consider reducing milk by 1 tablespoon. The loaf keeps at room temperature for 3 days or freezes wrapped for up to 3 months; thaw overnight in the fridge before warming.

Frequently asked questions

Can I use frozen zucchini? Yes; thaw and squeeze out all excess water and measure after squeezing—frozen zucchini tends to lose more structure so be diligent squeezing.

Why is my zucchini bread gummy in the middle? Usually because the zucchini wasn’t squeezed or the loaf didn’t bake long enough; make sure to remove surface liquid from grated zucchini and test with a toothpick at 50 minutes.

Can I make muffins instead of a loaf? Yes—use a standard muffin tin, fill cups about two-thirds full, and bake at 350°F for 18–22 minutes; check with a toothpick.

Will natural peanut butter work? It will, but stir thoroughly and expect a slightly denser crumb; you may need to reduce added milk by 1 tablespoon if the peanut butter is runny.

How do I know the loaf is done without overbaking? Look for a golden top with light cracks and test center with a toothpick that comes out with a few moist crumbs, not wet batter. Allow the loaf to rest 30 minutes after removing from the pan before slicing to let the center finish setting.

Closing

This peanut butter zucchini bread keeps a clear peanut butter character while staying moist thanks to squeezing the zucchini and a balanced wet-to-dry ratio; once you slice it after the brief rest you’ll get tender, slightly dense slices with chocolate pockets and a pleasant peanut aroma—perfect for a dependable homemade snack or breakfast.