Zucchini Bars with Frosting

Featured in Desserts.

Turn fresh zucchini into a sweet delight with these Brown Butter Zucchini Bars. The bars are made with grated zucchini, a touch of cinnamon, and classic cake ingredients, topped off with pecans for crunch. The real star is the brown butter frosting, made by toasting the butter until fragrant and nutty, then mixing it with powdered sugar, milk, and vanilla. Ready to serve in under an hour, this recipe is a fantastic way to use up summer zucchini for up to 24 servings.
A woman wearing an apron and smiling.
Updated on Fri, 25 Apr 2025 19:28:29 GMT
Fluffy zucchini bars coated with golden brown butter frosting, a tasty treat with a hint of garden-fresh flavor. Pin it
Fluffy zucchini bars coated with golden brown butter frosting, a tasty treat with a hint of garden-fresh flavor. | tasteofmoms.com

Garden zucchini transforms into an unbelievably moist treat with these bars topped with nutty browned butter frosting. I've made this my end-of-summer tradition after trying countless ways to use up zucchini. The balance of spices with that special frosting turns a simple snack into something guests always remember. Nothing else I've tried hits that perfect sweet spot between texture and flavor quite like this does.

When I shared these at our block party last year, six neighbors asked me for my secret. It's all about letting the natural wetness from the zucchini work through the batter instead of fighting it.

Key Ingredients and Smart Selection

  • Zucchini: Go for medium, firm ones rather than giant watery ones
  • All-Purpose Flour: The unbleached kind tastes better
  • Ground Cinnamon: Don't use the jar that's been sitting around forever
  • Eggs: Take them out early so they're not cold
  • Unsalted Butter: Grab European-style for best browning results
  • Vanilla Extract: Real vanilla works with the butter flavor
  • Pecans: Don't skimp here - they add crunch and depth
Soft, tender zucchini squares with creamy nutty frosting on top, showing flecks of green throughout. Pin it
Soft, tender zucchini squares with creamy nutty frosting on top, showing flecks of green throughout. | tasteofmoms.com

Simple Step-by-Step Instructions

Getting Your Zucchini Ready:
Keep the skin on for extra nutrients and pretty green flecks. Use the smallest holes on your grater. Don't drain off the liquid - you'll need that moisture. Let it sit while you work on other stuff.
Mixing Your Batter Right:
Mix all dry stuff first so your leaveners spread out evenly. Get your sugar, oil and eggs nice and fluffy. Use a gentle touch when adding dry ingredients - just until you don't see flour anymore. Fold in zucchini and nuts with just a few strokes.
Smart Baking Tricks:
Don't forget the corners when greasing your pan. Spread everything flat with a spatula. Give the pan a few taps on the counter. Put it right in the middle of your oven. Turn it around halfway.
Making Perfect Brown Butter:
Cut your butter into same-size chunks. Pick a light-colored pan so you can see the color changing. Keep the butter moving as it melts. Look for a golden color and nutty smell. Pour it into a bowl right away so it stops cooking.
Putting On The Frosting:
Let browned butter cool until it starts to firm up but still spreads easily. Run powdered sugar through a sifter. Add vanilla and milk bit by bit until it looks right. Frost while it's slightly warm. Make some fancy swirls on top.
Close-up of zucchini bars with swirls of golden-brown frosting, showing their moist, cake-like texture. Pin it
Close-up of zucchini bars with swirls of golden-brown frosting, showing their moist, cake-like texture. | tasteofmoms.com

Moisture Magic Explained

Getting these bars just right comes down to handling moisture correctly. The zucchini naturally makes everything moist while gentle mixing keeps everything tender. I've learned that stirring too much makes the bars tough, so I use a light hand when combining everything.

My grandma always told me to throw in a tiny bit of salt in the frosting. It really brings out the nutty flavor in the browned butter and cuts through all that sweetness.

Stack of zucchini bars showing layers of spiced cake and creamy brown butter frosting with nut pieces visible. Pin it
Stack of zucchini bars showing layers of spiced cake and creamy brown butter frosting with nut pieces visible. | tasteofmoms.com

I bring these bars everywhere from school fundraisers to family reunions. Something about the spiced, moist base with that special nutty frosting turns plain old zucchini into something people can't stop talking about. The trick is taking your time, especially when browning the butter. Whether you've got too many zucchinis or just want something different from the usual desserts, these bars show how veggies can shine in sweet treats too.

Frequently Asked Questions

→ How much zucchini should I shred?
You’ll need about 2 cups of shredded zucchini, which comes from roughly 3 medium-sized ones.
→ What should I look for when browning butter?
The butter should darken to a golden tone and smell nutty – be sure to stir and watch closely!
→ Can I leave out the pecans?
Absolutely, skipping the nuts works fine, though they add a nice crunchy texture.
→ What’s the best way to store these bars?
Keep frosted bars in a sealed container at room temperature for up to 3 days.
→ Do I need to blot the zucchini before baking?
Nope, don’t squeeze out the liquid – the moisture helps keep the bars perfectly soft.

Brown Butter Zucchini Bars

Soft zucchini bars dressed with buttery brown frosting and sprinkled with pecans. A must-try sweet treat packed with garden goodness.

Prep Time
20 Minutes
Cook Time
30 Minutes
Total Time
50 Minutes
By: Ashley

Category: Desserts

Difficulty: Intermediate

Cuisine: American

Yield: 24 Servings (24 pieces)

Dietary: Vegetarian

Ingredients

→ Bottom Layer

01 2 cups grated zucchini (roughly 3 medium ones)
02 1 1/2 cups chopped pecans
03 1/2 teaspoon of salt
04 1 teaspoon baking powder
05 1 1/2 teaspoons cinnamon powder
06 2 cups regular flour
07 1 cup of a neutral oil (like vegetable oil)
08 3 big eggs
09 1 1/2 cups white sugar

→ Frosting With Browned Butter

10 6 cups powdered sugar
11 8 to 10 tablespoons milk
12 6 tablespoons of butter
13 1 teaspoon pure vanilla extract

Instructions

Step 01

Warm up the oven to 350°F. Grease a 15x10x1 pan lightly with oil or butter. In another bowl, mix cinnamon, flour, baking powder, and salt, then hold on to it.

Step 02

Use a mixer to combine sugar, eggs, and oil until the mixture is smooth. Carefully mix the dry stuff into the wet until it all blends evenly.

Step 03

Toss in the shredded zucchini and pecans. Spread it all in the baking pan evenly. Bake for 30-40 minutes or until you can stick a toothpick in the center without it coming out sticky. Cool them off completely.

Step 04

On medium heat, melt butter in a saucepan, stirring occasionally until brown bits form. Stir in powdered sugar, milk, and vanilla. Keep mixing until smooth. Cover cooled bars with this frosting.

Notes

  1. A tasty way to use fresh zucchini from your garden
  2. Don’t frost unless bars are fully cooled off

Tools You'll Need

  • 15x10x1 pan for baking
  • Mixer with paddle attachment
  • Mixing bowl - medium size
  • Medium-sized saucepan
  • A whisk for stirring
  • Toothpick to test doneness

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Nuts (pecans)
  • Milk (butter)
  • Eggs
  • Gluten (flour)

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 292
  • Total Fat: 9 g
  • Total Carbohydrate: 52 g
  • Protein: 3 g