Low Carb Gluten Free Keto Zucchini Brownies

I spent years thinking I had to give up brownies completely when I started following a keto diet. Every attempt at making them ended up dry and crumbly, nothing like the rich, fudgy treats I remembered from my pre-keto days.

That’s until I discovered the magic of zucchini in low-carb baking. These brownies are nothing like those failed experiments – they’re moist and chocolatey, and you’d never guess they’re made with vegetables. Plus, being gluten-free means my friend Sarah, who has celiac disease, can finally enjoy them too.

What Kind of Zucchini Should I Use?

For baking brownies, medium-sized zucchini are your best bet since they tend to have fewer seeds and more flesh than larger ones. Look for zucchini that are firm and about 6-8 inches long – the really big ones can be watery and have large seeds that might affect your brownie texture. The most important step is squeezing out the excess moisture after grating – I recommend placing the grated zucchini in a clean kitchen towel and giving it a good squeeze, or using a fine-mesh strainer and pressing down with a spoon. You can use either green or yellow summer squash interchangeably in this recipe, as they have similar moisture content and mild flavor that won’t compete with the chocolate.

Options for Substitutions

Since this is a keto and gluten-free recipe, some ingredients are pretty specific, but there’s still room for some smart swaps:

• Almond flour: You can swap almond flour with sunflower seed flour (same amount) if you have nut allergies. Coconut flour is NOT a good substitute as it absorbs too much moisture and would make the brownies very dry.
• Butter: The recipe already mentions coconut oil as an alternative to butter – both work equally well in a 1:1 ratio. You could also use ghee if you prefer.
• Almond milk: Any unsweetened non-dairy milk works here – try coconut milk, macadamia milk, or hemp milk. Just make sure it’s sugar-free to keep it keto-friendly.
• Sugar substitute: You can use any granulated sugar substitute you prefer – erythritol, monk fruit sweetener, or allulose all work well. Just check the conversion chart for your specific brand as sweetness levels can vary.
• Zucchini: While zucchini is key for moisture in this recipe, you could try using grated yellow summer squash – just make sure to squeeze out the water the same way.
• Sugar-free chocolate chips: You can chop up a sugar-free chocolate bar instead, or skip them entirely for a less sweet brownie. You could also use chopped nuts for crunch.

Watch Out for These Mistakes While Baking

The biggest challenge when making keto zucchini brownies is dealing with excess moisture – make sure to thoroughly squeeze out the water from your grated zucchini using a clean kitchen towel or cheesecloth, as too much moisture will prevent your brownies from setting properly. Another common mistake is using cold eggs and almond milk, which can cause the melted butter to solidify and create a lumpy batter – always bring these ingredients to room temperature before mixing. When working with almond flour, avoid the temptation to overmix the batter as this can lead to dense, heavy brownies – instead, fold the ingredients gently until just combined. For the best texture, let these brownies cool completely before cutting (at least 30 minutes), as they continue to set while cooling and will be less likely to crumble when sliced.

What to Serve With Keto Zucchini Brownies?

These low-carb brownies pair wonderfully with a scoop of keto-friendly vanilla ice cream or a dollop of whipped cream (made with heavy cream and sugar substitute, of course!). For a nice temperature contrast, try warming the brownie slightly and serving it with a hot cup of coffee or unsweetened almond milk tea. If you’re hosting friends for dessert, you can dress these up by adding some fresh berries on the side – strawberries and raspberries are particularly good low-carb options that complement the chocolate flavor perfectly. A light sprinkle of sea salt on top just before serving brings out the rich chocolate taste even more.

Storage Instructions

Keep Fresh: These zucchini brownies stay good in an airtight container at room temperature for 2-3 days. For longer freshness, pop them in the fridge where they’ll last up to a week. I like to place a paper towel in the container to absorb any extra moisture from the zucchini.

Freeze: Want to save some for later? These brownies freeze really well! Cut them into squares, place them in a freezer-safe container with parchment paper between layers, and they’ll keep for up to 3 months. It’s super handy when you need a quick keto-friendly treat!

Thaw: When you’re craving a brownie from the freezer, just take out what you need and let it thaw in the fridge overnight, or leave it at room temperature for about an hour. You can even warm it up for 10-15 seconds in the microwave if you want that fresh-baked feeling.

Preparation Time	15-20 minutes
Cooking Time	20-25 minutes
Total Time	35-45 minutes
Level of Difficulty	Medium

Estimated Nutrition

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

• Calories: 800-900
• Protein: 20-25 g
• Fat: 60-70 g
• Carbohydrates: 50-60 g

Ingredients

For the brownies:

• 1 cup grated zucchini (squeezed to remove excess moisture)
• 1 1/4 cups almond flour (I use Bob’s Red Mill super-fine)
• 3 tbsp unsweetened almond milk
• 4 oz sugar-free chocolate chips
• 2 large eggs
• 1/3 cup cocoa powder
• 2/3 cup granulated sugar substitute
• 1 tsp vanilla essence
• 1/3 cup butter (melted and cooled)
• 1 tsp baking powder
• 1/2 tsp sea salt

For the chocolate drizzle (optional):

• 1 tsp coconut oil

Step 1: Prepare Your Baking Pan and Ingredients

Preheat your oven to 325°F (160°C).

Line an 8×8-inch baking pan with parchment paper and lightly grease it with coconut oil to prevent sticking.

Trim the ends of the zucchinis, keep their skin on, and using the thinner side of your box grater, shred them.

Place the shredded zucchinis in the center of a clean kitchen towel, gather the corners, and squeeze firmly to remove all the zucchini juice.

Measure out 1 cup of the shredded, drained zucchinis and set it aside in a bowl.

Step 2: Mix Dry Ingredients

In a mixing bowl, whisk together almond flour, cocoa powder, baking powder, sea salt, and your preferred sweetener.

Once mixed well, set this bowl aside for later use.

Step 3: Prepare Wet Ingredients

In a separate bowl, beat together the eggs, melted butter, almond milk, and vanilla extract.

Stir in the prepared shredded zucchinis until they are well incorporated into the wet mixture.

Step 4: Combine Ingredients and Add Chocolate Chips

Pour the dry ingredient mixture into the bowl of wet ingredients.

Use a spatula to stir everything together until well combined.

Then, gently fold in 1/3 cup of sugar-free dark chocolate chips, ensuring they are evenly distributed throughout the batter.

Step 5: Bake the Brownies

Transfer the prepared batter into the lined baking pan, using a spatula to spread it evenly across the pan.

Place the pan on the center rack of your preheated oven and bake for 20-25 minutes.

Check for doneness by inserting a toothpick into the center—the brownies are ready when it comes out with a few moist crumbs and the edges look dry while the middle remains soft and moist.

Step 6: Cool, Slice, and Decorate

Let the brownies cool on a cooling rack.

Once cooled, slice into 16 equal squares.

If desired, you can decorate with a drizzle of melted sugar-free chocolate for an extra touch.

Step 7: Melt Chocolate for Drizzle

In a saucepan over medium heat, melt sugar-free chocolate chips with a bit of coconut oil until the mixture becomes glossy and the chocolate is fully melted.

Drizzle this melted chocolate over the cooled zucchini brownies before slicing for a delicious finish.

Step 8: Storing and Serving

Store the zucchini brownies in the fridge for 3-4 days, or freeze them in an airtight container for longer storage.

When ready to enjoy from frozen, thaw the brownies at room temperature the day before serving to maintain their delicious texture.