Moist Lemon Yellow Squash Muffins

Here are my lemon yellow squash muffins, with a moist crumb packed with fresh shredded squash, bright lemon flavor throughout, and a sweet lemon glaze drizzled on top.

These muffins are a great way to use up all that summer squash from the garden. I love how the squash keeps them super moist without adding any weird flavor, and that tangy lemon glaze is just perfect with the morning coffee.

What Kind of Yellow Squash Should I Use?

For these muffins, any standard yellow squash from your grocery store or garden will work perfectly. Look for squash that’s medium-sized and firm to the touch – the smaller ones tend to be more tender and have fewer seeds, which is ideal for baking. If you end up with larger squash, just make sure to scoop out any big seeds before shredding. The key is to lightly squeeze your shredded squash in a clean kitchen towel or paper towels to remove excess moisture, but don’t go overboard – you want to keep some of that moisture to make your muffins nice and tender.

Options for Substitutions

These muffins are pretty forgiving when it comes to swapping ingredients:

• Yellow squash: Zucchini works perfectly as a swap since it has a similar texture and moisture content. You can also mix both squash and zucchini together if that’s what you have on hand.
• Sour cream: Greek yogurt makes a great substitute and adds extra protein. You can also use regular plain yogurt, though the muffins might be slightly less rich.
• Vegetable oil: Canola oil, melted coconut oil, or even melted butter will work just fine. Keep the measurements the same.
• Lemon extract: If you don’t have lemon extract, use an extra tablespoon of lemon juice and add ½ teaspoon of vanilla extract to make up for the missing flavor.
• All-purpose flour: You can substitute up to half the flour with whole wheat flour for a heartier muffin, though they’ll be a bit denser.
• Powdered sugar (for glaze): The glaze is optional, so feel free to skip it entirely or just dust the muffins with regular powdered sugar instead.

Watch Out for These Mistakes While Baking

The biggest mistake you can make with these muffins is skipping the step of squeezing excess moisture from the shredded squash, which can lead to dense, soggy muffins that never quite bake through properly – use a clean kitchen towel or paper towels to really wring it out.

Overmixing the batter once you add the flour mixture is another common error that results in tough, rubbery muffins instead of light and tender ones, so stir just until the flour disappears and no more.

Don’t wait to glaze your muffins until they’re completely cool, as the glaze needs to soak into the warm muffins to create that sweet, lemony coating – pour it on while they’re still hot from the oven.

Finally, fill your muffin tins only about two-thirds full to prevent overflow and ensure even baking, and use an instant-read thermometer to check that the internal temperature reaches 200-205°F for perfectly baked muffins.

What to Serve With Lemon Yellow Squash Muffins?

These muffins are perfect for breakfast or brunch alongside a hot cup of coffee or tea – the lemon flavor really shines in the morning. I love serving them with a simple fruit salad made with berries and melon, which complements the citrus notes without being too heavy. They also make a great afternoon snack with a glass of cold milk or lemonade. If you’re putting together a brunch spread, these muffins pair nicely with scrambled eggs, crispy bacon, and fresh yogurt with honey.

Storage Instructions

Store: Keep your lemon yellow squash muffins in an airtight container at room temperature for up to 3 days, or in the fridge for up to a week. The sour cream keeps them nice and moist, so they actually taste great even a few days later.

Freeze: These muffins freeze really well for up to 3 months. I like to wrap them individually in plastic wrap, then put them all in a freezer bag so I can grab just one or two whenever I want. They thaw in about an hour on the counter, or you can microwave them for 20-30 seconds.

Glaze Tip: If you’re planning to freeze the muffins, I’d wait to add the lemon glaze until after they’ve thawed. The glaze can get a little sticky in the freezer, and it tastes fresher when you drizzle it on right before serving anyway.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 3050-3250
• Protein: 35-40 g
• Fat: 100-110 g
• Carbohydrates: 490-520 g

Ingredients

For the batter:

• 1 1/2 cups sugar
• 1/2 cup oil (I use Wesson vegetable oil for a neutral taste)
• 1 1/2 tsp lemon extract
• 3 eggs (room temperature, about 70°F)
• 1 cup sour cream (I prefer Daisy for a thicker texture)
• 2 cups yellow squash (finely shredded and squeezed dry)
• 2 tbsp lemon juice
• 1 tbsp fresh lemon zest
• 2 1/2 cups flour (I always use King Arthur all-purpose flour)
• 1 tsp baking powder
• 1 tsp baking soda
• 3/4 tsp salt

For the glaze:

• 1 1/2 cups powdered sugar (sifted to remove lumps)
• 1/2 tsp vanilla extract
• 3 tbsp lemon juice (freshly squeezed for best tang)
• 1 pinch fine salt

Step 1: Prepare the Mise en Place and Dry Ingredients

• 2 1/2 cups flour
• 1 tsp baking powder
• 1 tsp baking soda
• 3/4 tsp salt
• 2 cups yellow squash

Preheat your oven to 350°F and grease a 24-cup muffin tin (or two 12-cup tins).

In a medium bowl, whisk together the flour, baking powder, baking soda, and salt, then set aside.

Prepare your shredded yellow squash by finely shredding it with a box grater or food processor, then place it in a clean kitchen towel and squeeze firmly to remove as much moisture as possible—this prevents the muffins from becoming soggy.

Have all your other ingredients measured and ready, with eggs at room temperature for better emulsification.

Step 2: Build the Wet Ingredient Base

• 1 1/2 cups sugar
• 1/2 cup oil
• 1 1/2 tsp lemon extract
• 3 eggs
• 2 tbsp lemon juice
• 1 tbsp fresh lemon zest
• 1 cup sour cream

In a large mixing bowl, whisk together the sugar, oil, lemon extract, and room-temperature eggs until the mixture is well combined and pale, about 1-2 minutes.

The oil and sugar create an emulsion that keeps the muffins tender.

Stir in the lemon juice and lemon zest, then fold in the sour cream gently until just combined—I like using Daisy brand sour cream because its thicker consistency helps maintain the muffin structure better than thinner varieties.

Step 3: Combine Wet and Dry Ingredients

• wet ingredient mixture from Step 2
• 2 cups yellow squash
• dry ingredient mixture from Step 1

Add the squeezed-dry shredded squash to the wet ingredient mixture and fold it in gently until evenly distributed.

Pour the dry ingredient mixture from Step 1 over the wet ingredients and fold everything together with a spatula until just combined—do not overmix, as this will develop gluten and create tough muffins.

The batter should look thick and slightly lumpy, which is exactly what you want.

Step 4: Fill and Bake the Muffins

• batter from Step 3

Divide the batter evenly among the prepared muffin cups, filling each about two-thirds full.

Bake at 350°F for 22-25 minutes, until a toothpick inserted into the center of a muffin comes out with just a few moist crumbs—don’t overbake or they’ll become dry.

The muffin tops should be golden brown and slightly domed.

Step 5: Prepare the Lemon Glaze

• 1 1/2 cups powdered sugar
• 1/2 tsp vanilla extract
• 3 tbsp lemon juice
• 1 pinch fine salt

While the muffins are baking, prepare the glaze by sifting the powdered sugar into a small bowl to remove any lumps.

Whisk in the vanilla extract, freshly squeezed lemon juice, and a pinch of fine salt until you have a smooth, pourable consistency—it should be thick enough to coat a spoon but thin enough to drizzle.

I always use freshly squeezed lemon juice for the glaze because the bright, tangy flavor really makes a difference in the final taste.

Step 6: Glaze and Cool the Muffins

• baked muffins from Step 4
• lemon glaze from Step 5

Remove the muffins from the oven and let them cool in the pan for 2-3 minutes, then turn them out onto a wire cooling rack.

While the muffins are still warm (but not piping hot), drizzle or spoon the lemon glaze over the tops, allowing it to run down the sides slightly.

Let the muffins cool completely on the rack before serving, which allows the glaze to set and the flavors to meld together beautifully.

Moist Lemon Yellow Squash Muffins

Delicious Moist Lemon Yellow Squash Muffins recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 30 minutes mins

Total Time 45 minutes mins

Servings: 24 muffins

Calories: 3150

Ingredients Method

Ingredients

  

For the batter:

• 1 1/2 cups sugar
• 1/2 cup oil (I use Wesson vegetable oil for a neutral taste)
• 1 1/2 tsp lemon extract
• 3 eggs (room temperature, about 70°F)
• 1 cup sour cream (I prefer Daisy for a thicker texture)
• 2 cups yellow squash (finely shredded and squeezed dry)
• 2 tbsp lemon juice
• 1 tbsp fresh lemon zest
• 2 1/2 cups flour (I always use King Arthur all-purpose flour)
• 1 tsp baking powder
• 1 tsp baking soda
• 3/4 tsp salt

For the glaze:

• 1 1/2 cups powdered sugar (sifted to remove lumps)
• 1/2 tsp vanilla extract
• 3 tbsp lemon juice (freshly squeezed for best tang)
• 1 pinch fine salt

Method

 

1. Preheat your oven to 350°F and grease a 24-cup muffin tin (or two 12-cup tins). In a medium bowl, whisk together the flour, baking powder, baking soda, and salt, then set aside. Prepare your shredded yellow squash by finely shredding it with a box grater or food processor, then place it in a clean kitchen towel and squeeze firmly to remove as much moisture as possible—this prevents the muffins from becoming soggy. Have all your other ingredients measured and ready, with eggs at room temperature for better emulsification.
2. In a large mixing bowl, whisk together the sugar, oil, lemon extract, and room-temperature eggs until the mixture is well combined and pale, about 1-2 minutes. The oil and sugar create an emulsion that keeps the muffins tender. Stir in the lemon juice and lemon zest, then fold in the sour cream gently until just combined—I like using Daisy brand sour cream because its thicker consistency helps maintain the muffin structure better than thinner varieties.
3. Add the squeezed-dry shredded squash to the wet ingredient mixture and fold it in gently until evenly distributed. Pour the dry ingredient mixture from Step 1 over the wet ingredients and fold everything together with a spatula until just combined—do not overmix, as this will develop gluten and create tough muffins. The batter should look thick and slightly lumpy, which is exactly what you want.
4. Divide the batter evenly among the prepared muffin cups, filling each about two-thirds full. Bake at 350°F for 22-25 minutes, until a toothpick inserted into the center of a muffin comes out with just a few moist crumbs—don't overbake or they'll become dry. The muffin tops should be golden brown and slightly domed.
5. While the muffins are baking, prepare the glaze by sifting the powdered sugar into a small bowl to remove any lumps. Whisk in the vanilla extract, freshly squeezed lemon juice, and a pinch of fine salt until you have a smooth, pourable consistency—it should be thick enough to coat a spoon but thin enough to drizzle. I always use freshly squeezed lemon juice for the glaze because the bright, tangy flavor really makes a difference in the final taste.
6. Remove the muffins from the oven and let them cool in the pan for 2-3 minutes, then turn them out onto a wire cooling rack. While the muffins are still warm (but not piping hot), drizzle or spoon the lemon glaze over the tops, allowing it to run down the sides slightly. Let the muffins cool completely on the rack before serving, which allows the glaze to set and the flavors to meld together beautifully.