Keto Cinnamon Sugar Donut Recipe

Emily MorganPosted on April 26, 2026

Keto Cinnamon Sugar Donut served warm with cozy spices

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I have a confession to make. For years, I thought my donut-making days were over when I changed how I ate.

I missed that warm, spiced smell filling my kitchen more than anything. The classic cinnamon sugar treat felt like a lost friend, much like my quest for the perfect crispy air fryer cinnamon sugar banana chips.

So, I got stubborn in my little home kitchen. I was determined to crack the code on a Keto Cinnamon Sugar Donut that didn’t taste like a compromise.

After what felt like a hundred batches, I finally found the magic. It’s all in the blend of flours and one special, simple trick I’ll share with you.

Recipe Overview

Cuisine: American
Category: Breakfast, Dessert, Snack
Prep Time: 10 minutes
Cook Time: 12 minutes
Total Time: 22 minutes
Servings: 6 donuts

Why This Recipe is So Special

This recipe is special because it fixes the biggest keto baking problem: dryness.

My secret weapon is a combination of almond flour and a little coconut flour. The almond flour gives a tender, moist crumb.

The coconut flour soaks up just enough moisture to give it that perfect cake-like donut texture. It’s a balance I worked on for months.

Plus, we’re not frying. We’re baking. This makes them so easy and much less messy. You get all the cozy flavor without the fuss, similar to the convenience of making crispy cinnamon sugar banana chips in the air fryer.

The Full Ingredient List

Gathering your ingredients first makes everything flow so smoothly. Here’s what you’ll need for the donuts and that magical coating.

For the Donuts:

1 1/2 cups fine blanched almond flour
2 tbsp coconut flour
1/3 cup granulated erythritol (or your favorite keto sweetener)
2 tsp baking powder
1 1/2 tsp ground cinnamon
1/4 tsp salt
3 large eggs, at room temperature
1/4 cup melted butter or coconut oil
1/4 cup unsweetened almond milk
1 tsp vanilla extract

For the Cinnamon Sugar Coating:

1/4 cup granulated erythritol
1 tbsp ground cinnamon
3 tbsp melted butter (for brushing)

My Step-by-Step Method

Follow these steps closely. I promise, it’s simpler than it looks. The result is absolutely worth it.

Preheat your oven to 350°F (175°C). Grease a standard 6-cavity donut pan very well. This is key for easy removal later.
In a large bowl, whisk together the almond flour, coconut flour, sweetener, baking powder, cinnamon, and salt. Get out any lumps.
In a separate bowl, beat the eggs. Then whisk in the melted butter, almond milk, and vanilla until it’s all smooth and combined.
Pour the wet ingredients into the dry ingredients. Gently stir until you have a thick, uniform batter. Don’t overmix it.
Spoon the batter into the prepared donut pan. You can also use a piping bag for less mess. Fill each cavity about 3/4 full.
Bake for 10-12 minutes. They’re done when the tops spring back lightly when touched. Let them cool in the pan for 5 minutes.
Carefully transfer the donuts to a wire rack. Let them cool until they’re just warm to the touch, not hot.
For the coating, mix the sweetener and cinnamon in a shallow bowl. Brush each warm donut lightly with melted butter.
Dredge the butter-brushed donut in the cinnamon “sugar” mixture. Coat it evenly all over. Repeat with all donuts.
Serve immediately while they’re still a bit warm. That’s when they are truly magical.

My Top Tips for Success

Room temperature eggs are non-negotiable. They blend into the batter much better, giving you a smoother texture.
Use a piping bag or a zip-top bag with the corner snipped off to fill the donut pan. It’s so much cleaner and easier than using a spoon.
Let the donuts cool just enough to handle before coating. If they’re too hot, the coating can melt. Too cold, and the butter won’t stick well.
If your cinnamon sugar mix isn’t sticking well, just brush on a little more melted butter. It’s the glue that holds all the flavor on.

Common Mistakes to Avoid

I’ve made these mistakes so you don’t have to. Here’s how to steer clear of the common pitfalls.

Using coarse almond flour. This will give you a gritty texture. Always look for “fine blanched” almond flour for the best, smoothest crumb.

Overfilling the donut pan. The batter will rise. If you fill the cavities to the top, you’ll lose the classic donut hole shape.

Skipping the pan greasing. Even if your pan is non-stick, please grease it. This makes sure your beautiful donuts come out in one perfect piece.

NUTRITION INFORMATION

(Per donut, approximate)

Calories: 280
Fat: 25g
Net Carbs: 4g
Total Carbs: 8g
Fiber: 4g
Protein: 9g

FREQUENTLY ASKED QUESTIONS

Can I make these without a donut pan?

You can! Simply grease a muffin tin well and fill the cups halfway. Bake them as muffins. The flavor will be the same, just in a different shape.

How should I store leftover donuts?

Store them in an airtight container at room temperature for up to 2 days. For longer storage, keep them in the fridge for up to 5 days. The coating may soften a little.

My batter seems very thick. Is that right?

Yes, that’s perfect! Keto batters are often thicker than traditional ones. This thickness is what gives the donuts their wonderful, substantial texture.