Frosted Zucchini Spice Bars

Category: Sweet Endings

Frosted Zucchini Spice Bars bring together shredded zucchini, a hint of cinnamon, and a trio of warming spices for an exceptionally moist, flavorful dessert. These bars are baked until golden, then generously slathered with a smooth, sweet frosting made from powdered sugar and milk. Zucchini keeps every bite tender, while the careful blend of cinnamon, nutmeg, and cloves elevates their spiced aroma. For best results, finely grate the zucchini and squeeze out excess liquid before folding into the batter. Allow the bars to cool fully before frosting to ensure a perfect, creamy finish on top.

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Updated on Sat, 09 Aug 2025 18:09:47 GMT
A slice of cake with white frosting. Save
A slice of cake with white frosting. | sweetbyemma.com

These frosted zucchini spice bars are the softest treats to ever grace my kitchen This recipe has saved many late summer zucchinis and the warm spices plus creamy frosting make it a family favorite for cozy gatherings or after school snacks

The first time my mom brought these to a potluck they disappeared in minutes Everyone wanted the recipe so I have been baking them every year since then

Ingredients

  • Grated zucchini: adds moisture and mild flavor making the bars tender Choose firm medium sized zucchini and grate finely for best texture
  • Unsalted butter: gives rich flavor and soft crumb Let it soften at room temperature before using
  • Granulated sugar: sweetens and helps create a light fluffy texture Use pure cane sugar if possible
  • Eggs: provide structure and help bind the batter Always use large eggs for consistent results
  • Vanilla extract: brings a sweet depth Opt for pure vanilla over imitation
  • All purpose flour: creates a sturdy but soft base Look for fresh flour without any off odor
  • Baking soda: leavens the bars and helps them rise evenly Double check it is fresh and lump free
  • Salt: sharpens the sweetness and balances the spices Fine sea salt is ideal
  • Ground cinnamon: main spice note Make sure it is aromatic and not faded
  • Ground nutmeg: gives warmth and complexity Freshly grated brings extra punch
  • Ground cloves: add a subtle depth A little goes a long way so measure carefully
  • Powdered sugar: is the key to creamy glaze Sift for ultra smooth finish
  • Milk: brings the glaze to a spreadable consistency Whole milk makes it extra rich

Step-by-Step Instructions

Prep Your Pan:
Grease and flour a nine by thirteen inch baking pan so the bars come out cleanly and do not stick Set the oven to three hundred fifty degrees Fahrenheit
Cream Butter and Sugar:
Combine the softened butter and granulated sugar in a large bowl Beat together until pale and fluffy which takes three to five minutes This builds a tender structure
Add Eggs and Vanilla:
Crack eggs in one at a time then stir in the vanilla extract Mix just until incorporated so the batter stays airy
Combine Dry Ingredients:
In a separate bowl whisk flour baking soda salt cinnamon nutmeg and cloves This ensures even distribution of leavening and spice
Mix Wet and Dry:
Gradually add dry ingredients to the wet mixture Stir gently until you see no more dry flour Stop mixing as soon as everything is combined for the softest bars
Fold in the Zucchini:
Squeeze any excess moisture from grated zucchini before adding Fold it in gently so the batter stays light and moist
Bake the Bars:
Spread the batter evenly in the prepared pan Bake on the center rack for twenty five to thirty minutes Test by inserting a toothpick into the center If it comes out clean the bars are done Cool completely in the pan
Make and Spread the Frosting:
In a small bowl whisk powdered sugar and milk until smooth The glaze should be thick yet pourable Spread evenly over cooled bars for a glossy finish
Cut and Serve:
Slice into squares and lift out with a small spatula Serve right from the pan or stack on a platter
A stack of cake bars with white frosting. Save
A stack of cake bars with white frosting. | sweetbyemma.com

I love the way grated zucchini melts into the batter and adds richness without anyone noticing Once my little nephew helped me press the zucchini in a towel to squeeze out water and giggled the whole time It is a memory that makes this recipe extra special for me

Storage Tips

Let the bars cool completely before sealing them in an airtight container Store at room temperature for up to three days For longer storage freeze the bars unfrosted and add glaze after thawing

Ingredient Substitutions

Try using melted coconut oil instead of butter for a dairy free option For extra spice you can swap half the cinnamon with pumpkin pie spice You can also use a gluten free all purpose flour blend with great results

Serving Suggestions

These bars go perfectly with a warm mug of tea or coffee For a festive touch sprinkle chopped walnuts or a dusting of cinnamon on the frosting before it sets I have also enjoyed them as a sweet brunch addition

Cultural and Historical Context

Zucchini baked goods gained popularity in American home kitchens to help use garden surplus The subtle flavor and moisture of zucchini make it a clever choice for soft cakes and bars Spiced bakes with creamy frostings are a staple at autumn gatherings and church potlucks in my family

Recipe FAQs

→ How do I prepare the zucchini before mixing?

Finely grate the zucchini and squeeze out any extra moisture using a clean towel. This keeps the bars from becoming too soggy.

→ Can I substitute the spices?

Yes, you can adjust the blend of cinnamon, nutmeg, and cloves to suit your taste or substitute with pumpkin pie spice for convenience.

→ How should I store the finished bars?

Store bars in an airtight container at room temperature for up to three days. They can also be refrigerated for longer freshness.

→ Is it necessary to use unsalted butter?

Unsalted butter is recommended to control the overall saltiness, but salted butter can be used if you reduce added salt accordingly.

→ What’s the best way to frost the bars?

Wait until the bars are completely cool, then spread the frosting evenly with an offset spatula for a smooth finish.

Frosted Zucchini Spice Bars

Tender spice bars feature zucchini and cinnamon, crowned with creamy frosting for a classic treat.

Prep Time
15 min
Cook Time
30 min
Total Time
45 min
By: Emma

Category: Desserts

Skill Level: Moderate

Cuisine: American

Yield: Approximately 12 bars

Dietary Preferences: Vegetarian

What You'll Need

01 1 cup grated zucchini
02 1/2 cup unsalted butter, softened
03 1 1/2 cups granulated sugar
04 2 large eggs
05 1 teaspoon vanilla extract
06 1 1/2 cups all-purpose flour
07 1 teaspoon baking soda
08 1/2 teaspoon salt
09 1 teaspoon ground cinnamon
10 1/4 teaspoon ground nutmeg
11 1/4 teaspoon ground cloves
12 1 cup powdered sugar
13 2 tablespoons milk

How to Make It

Step 01

Preheat oven to 350°F (175°C). Grease and flour a 9x13 inch baking pan.

Step 02

In a large bowl, cream together the softened butter and granulated sugar until light and fluffy.

Step 03

Beat in the eggs one at a time, then stir in the vanilla extract.

Step 04

In a separate medium bowl, whisk together the all-purpose flour, baking soda, salt, cinnamon, nutmeg, and cloves.

Step 05

Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.

Step 06

Fold in the grated zucchini.

Step 07

Pour the batter into the prepared baking pan and spread evenly.

Step 08

Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.

Step 09

Let the bars cool completely in the pan on a wire rack.

Step 10

While the bars cool, prepare the frosting. In a small bowl, whisk together the powdered sugar and milk until smooth. Add more milk if needed to reach the desired consistency.

Step 11

Once the bars are completely cool, spread the frosting evenly over the top. Cut into squares and serve.

Additional Notes

  1. Make sure the zucchini is grated finely.
  2. Squeeze out any excess moisture from the grated zucchini before adding it to the batter.
  3. Store leftover bars in an airtight container at room temperature for up to 3 days.

Tools Required

  • 9x13 inch baking pan
  • Large bowl
  • Medium bowl
  • Wire rack
  • Whisk

Allergen Information

Double-check each ingredient for allergens and reach out to a healthcare professional if you're unsure.
  • Contains dairy (butter and milk).
  • Contains gluten (all-purpose flour).
  • Contains eggs.

Nutritional Information (Per Serving)

These nutrition details are provided as a guide and are not a substitute for professional medical advice.
  • Calories: 200
  • Fats: 8 g
  • Carbohydrates: 30 g
  • Proteins: 2 g