Single Serve Keto Donut
Published April 1, 2024 • Updated June 9, 2026
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I make this single keto donut when I need a quick fix. One small bowl, 10 minutes, and you're eating a fresh glazed donut with sprinkles. No batch cooking, no leftovers.
I walk past bakery cases all the time and there’s never a low carb donut option. If I want a glazed donut or chocolate donut, I have to make it myself. But here’s the thing: I don’t want to spend an hour making a dozen donuts when I only want one right now.
So I built this recipe around that exact craving. One donut, about 10 minutes start to finish, no leftovers sitting around tempting me for days. I fry mine in lard because I’ve tested it both ways. Avocado oil works fine, but lard gives it that actual-donut taste that makes the difference. If you want a full batch, I’ve got churro donut holes, jelly donuts, apple cider donuts, and even Instant Pot donuts. But when it’s just me and I want one right now, this is what I reach for.
I developed this after making too many batches of donuts that sat in my kitchen for days. I’d eat one, feel great about it, and then eat three more by the end of the week because they were just sitting there. Making just one at a time solves that problem. One and done. The other thing I was after was skipping the eggs. Every donut recipe I found needed at least one egg, and for a single donut, cracking an egg felt like overkill. Turns out the combination of xanthan gum and baking powder does the job. The xanthan gum binds the dough, the baking powder lifts it, and the hot oil crisps the outside while the inside stays soft.
What makes this different?
- Just one donut – No batch cooking, no leftovers. I get sick of eating the same thing over and over, so single serve recipes like this are exactly what I need.
- Ready in 10 minutes – One small bowl, minimal cleanup, and you’re eating a fresh donut before your coffee gets cold.
- Only 2.5 net carbs – I use almond flour, protein powder, and sugar-free sweetener. The whole donut stays under 3 net carbs even with the glaze.
- No eggs needed – Most keto donut recipes need eggs, but I found they weren’t necessary here. The dough puffs up and rises when fried without them.
- Hole shaping trick – Make the hole wider than you think. I learned this the hard way. The dough puffs as it fries, and the hole closes in on itself. If you start small, you end up with a ball.
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Keto Cake Donut Ingredients
1/4 cup almond flour -
1 tablespoon unflavored or vanilla flavored protein powder
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1 teaspoon sugar-free sweetener
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1/4 teaspoon baking powder
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1/4 teaspoon xanthan gum
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pinch of salt
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1 tablespoon unsalted butter, melted
-
1/2 tablespoon sour cream
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1/2 tablespoon hot water
-
lard, for frying
Sugar-free Glaze Ingredients
-
2 tablespoons powdered sugar-free sweetener
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1-2 teaspoons milk of choice
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1/4 teaspoon vanilla extract
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sugar-free sprinkles
Step by Step Instructions
Step by Step Instructions
Mix the dry ingredients
In a small bowl, whisk together almond flour, protein powder, sweetener, baking powder, xanthan gum and salt.
- 1/4 cup almond flour
- 1 tablespoon protein powder
- 1 teaspoon sugar-free sweetener
- 1/4 teaspoon baking powder
- 1/4 teaspoon xanthan gum
- pinch of salt
Mix in wet ingredients
Stir in melted butter, sour cream and hot water. Let the dough sit for 2-3 minutes while you heat up the oil.
- 1 tablespoon unsalted butter, melted
- 1/2 tablespoons sour cream
- 1/2 tablespoon hot water
Melt the lard
Add enough lard to your smallest skillet to cover the donut at least halfway (about 1/2 inch). Heat over low.
- lard
Play with your food
Roll the dough into a ball and place it on a sheet of parchment paper. Use your index finger to punch a hole in the center, then move your finger in small circles to shape the donut. Make the hole a little wider than you think it needs to be. The donut puffs up as it cooks and the hole will close in on itself.
Check your oil
Toss a small piece of leftover dough from the bowl into the skillet. If it sizzles, the oil is ready.
Fry the donut
Use a spatula to lift the donut from the parchment paper and lower it into the oil. Swirl or tilt the skillet gently to help the oil cover the sides. After about 1-2 minutes, check if the underside is golden brown. Flip carefully and cook for another 2-3 minutes until golden. Remove and place on a paper towel lined plate.
Make the glaze
Mix powdered sweetener with 1-2 teaspoons milk and vanilla. Add more milk if needed to get a pourable glaze. Dip the top of the donut in the glaze, then add sprinkles.
- 2 tablespoons powdered sugar-free sweetener
- 1-2 teaspoons milk of choice
- 1/4 teaspoon vanilla extract
- sprinkles
Nutrition disclaimer
The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.
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Get My Macros + Recipes →Frequently Asked Questions
My donut dissolved when I went to fry it. What happened?
Your oil was too hot. I have a gas stove and keep my burner on low or medium-low, which lands somewhere around 325-350°F if you're using a thermometer. Gas runs hotter than electric at the same dial setting, so if you're on gas, start lower than you think. If the oil gets too hot, the outside cooks before the inside sets and the whole thing falls apart. I test with a small piece of dough first. If it sizzles gently, you're good. If it pops and spatters, turn it down and wait a minute.
Can I bake this instead of frying it?
You can bake at 325°F for about 10 minutes or air fry at 325°F for 6-8 minutes. I prefer frying for the texture and flavor, but I've done both and baking gives you a slightly denser donut with a drier exterior. If you bake, shape it in a greased ramekin or on parchment so it holds together. It won't puff up quite as much without the oil surrounding it.
Can I add more sweetener to the donut?
Yes, add more if you want. I keep the sweetener low in the base recipe since I top mine with glaze. If you're skipping the glaze or prefer sweeter donuts, go ahead and increase it. I'd start by doubling the sweetener in the dough and adjusting from there.
Can I use coconut flour instead of almond flour?
I don't recommend it for this recipe. Coconut flour absorbs 3-4 times more liquid than almond flour, so you'd need to completely rework the ratios. I tried it once and ended up with a dense, dry puck that wouldn't hold together in the oil. Almond flour gives this the right texture and structure for frying.
What can I use instead of sour cream?
Greek yogurt works perfectly here. Same tang, slightly thicker, which actually helps the dough hold together better. I've made it with both and go back and forth depending on what's in my fridge. For dairy-free, use the thick part from a chilled can of coconut cream, same measurement.
Can I make this without xanthan gum?
I wouldn't skip it. The xanthan gum is what binds the dough together without eggs. Without it, the dough crumbles apart when you try to shape it and dissolves in the oil. I tested a batch without it early on and that's exactly what happened. If you don't have xanthan gum, psyllium husk powder (about 1/2 teaspoon) is the closest substitute I've found.
Can I double this to make two donuts?
Yes, just double everything. I fry them one at a time in the same oil since my small skillet only fits one comfortably. The second one usually comes out even better because I've dialed in the heat by then. A reader doubled it and said the texture was actually a bit better with two, so it scales fine.
chocolate protein powder. basically a chocolate old-fashioned now.
Chocolate old-fashioned at 2.5g net carbs. Trying that this week.
I added a tiny bit more sweetener to cut the bitterness from the chocolate powder.
Swapped granulated for powdered erythritol in the glaze. Way smoother.
Should've been powdered in the original. The granulated leaves a little grit when it doesn't fully dissolve.
Makes sense, I kept thinking I wasn't mixing it enough. Powdered from now on.
one is never enough but that's a me problem
Brought a batch of these to my sister's pool party and the moment I mentioned the net carbs, three people who were not on keto just stared at me. The almond flour base fries up so clean, no greasiness, just this pillowy interior with a crisp edge. I kept getting pulled aside to spell out the ingredient list. That reaction alone is why I'm making another round this weekend.
Non-keto people asking for the ingredient list is my favorite outcome. 2.5g does the convincing.
Wasn't convinced almond flour could actually do a donut texture, but the xanthan gum changes everything. Real chew, not the crumbly fall-apart thing. I get it now.
Yeah, the xanthan gum is doing the work eggs usually do. Without it the dough just dissolves in the oil. Took me one ruined batch to figure that out.
My grandmother kept a jar of lard in the cabinet specifically for Sunday donuts. Three years into keto and I'd stopped thinking about that. First bite of this brought it back in a way I wasn't prepared for.
Food memory is real. The frying smell is half of what makes it feel like Sunday.
Never fried anything before and it came out looking like an actual donut on the first try. Does coconut oil work instead of lard or does it mess with the texture?
Coconut oil works, texture's about the same. You'll get that coconut flavor in there though. Some love it, some don't. Still prefer lard.
I pre-portion the dry ingredients into little bags on Sundays, so this goes from a 10-minute recipe to about a 3-minute morning. The 2-3 minute dough rest lines up with my coffee, which feels almost suspicious. Batch prep people, this is your single-serve answer.
That rest isn't accidental. The xanthan gum needs the time to hydrate or the dough tears when you shape it. Coffee timing was just luck.
My mom made yeasted donuts on Sunday mornings when I was a kid. I stopped thinking about them when I went keto, just sort of filed it away. Made this one Sunday on a whim and the smell of lard heating up brought everything back before I even took a bite. It's not the same dough and I won't pretend otherwise, but the glaze and that slightly crispy outside hit close enough that I got a little emotional at my kitchen counter. Four stars because I still miss the yeast tang, but this fills a gap I figured was just gone.
The lard smell is real. I still use it specifically for that. And no, the yeast tang is just gone on keto, nothing gets you there. Four stars tracks.
Ok I have to be real because I see mostly 5-star reviews and I want the beginner perspective represented. The taste was so surprisingly donut-like that I texted a photo to a friend at 10pm. My only struggle was the lard depth (the recipe says enough to cover halfway, but in my tiny skillet I had no idea what that actually looked like) and my first one came out pale and kind of oily. Second try with more lard and it was genuinely impressive for 10 minutes of work. A photo of the oil level or an actual measurement would save new keto bakers a whole failed donut.
Pale and oily is almost always the temp, not the depth. The oil needs to be sizzling when the dough hits, or the outside soaks before it sets. For a small pan I aim for about 1/2 inch of lard. I'll add a photo.
Was skeptical about firing up a pan of lard for one donut, seemed like overkill. But every baked keto donut I've tried goes dense and kind of rubbery in the middle, and this one doesn't. That fried crust actually holds up.
Yeah, baked just can't replicate it. The hot lard sets the outside fast, and that's what keeps the inside from going rubbery. Worth the small pan.
My sister is visiting this weekend and I want to make these Saturday morning as a treat. Since it's single-serve, should I just do separate batches one at a time or can I scale the dough and divide it? Also wondering if the lard holds up for frying a few in a row or if you need to add more between batches.
Scale it, just double or triple the dough and divide. I fry one at a time in the same oil, and the lard holds fine through several donuts. Maybe a small top-off if it looks low after 3 or 4, but I've never had to swap it out mid-session.
Made a round of these for friends Saturday, one at a time since that's just how the recipe works. My friend Jen had brought a box of actual donuts and still grabbed a piece of mine. She asked if I picked them up somewhere, and when I said no I fried them at home in lard, she goes 'oh that makes sense.' I still don't totally know what that means but I'll take it. 2.5 carbs and no complaints.
Ha, I've gotten that reaction before and still don't know what it means. But somebody with a box of real donuts right there reached for yours. That's the review.
Don't skip the dough rest. First time I did, I had sticky dough all over my hands for two solid minutes. Let it sit the full three and it firms up enough to roll into a ball no problem.
Three minutes feels like nothing but the xanthan gum is still hydrating in there. Rush it and you get exactly what you described.
Never actually fried anything at home before, always figured the mess wasn't worth it. But I had lard sitting in the pantry from a pie crust project and the 10-minute promise finally got me over the hump. The dough came together faster than I expected, and the xanthan gum does something weird to the texture. You can feel it firm up under your hands while you're mixing. Dropped it in the oil and watched it go golden in under two minutes. That part surprised me more than the taste did. Quick question: have you tested this with coconut flour? I have a bag to use up and wondering if the ratios hold or need adjusting.
Coconut flour won't work here without rebuilding the whole recipe. It absorbs 3-4x more liquid than almond flour, so the ratios just fall apart. I tried it once and got a dense dry puck that dissolved the second it hit the oil.