Lemon Poppy Seed Mug Cake


5 from 8 votes
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Enjoy a keto lemon and poppyseed mug cake muffin recipe, ready in 1 minute and made with wholesome ingredients! Packed with protein and drizzled with a sugar free glaze, you won’t believe this healthy mug cake is low carb!

A keto low carb healthy lemon poppy seed mug cake muffin that is tender on the outside, moist on the inside!

Healthy Lemon Poppy Seed Mug Muffin

We love our mug cakes around here, especially when it comes to portion controlled desserts. We’ve had blueberry mug cake, a lemon mug cake, and a cinnamon roll mug cake. It’s time for the lemon version to come to play!

Tender on the outside, light and fluffy on the inside, this lemon poppy seed mug cake muffin is a winner. It’s sweet and delicious, with hints of lemon throughout. It’s also topped with a fool-proof sugar free frosting!

I was inspired by both Starbucks and Costco, who I think to make the BEST lemon poppy seed muffins ever. 

Lemon Poppy Seed Mug Muffin Ingredients

  • Almond flour
  • Coconut Flour
  • Granulated Sweetener of choice
  • Poppy Seeds
  • Lemon Extract 
  • Milk of choice
  • Egg 

How to make the BEST lemon poppy seed mug cake muffin 

Sift your coconut flour

Be sure to sift your coconut flour before mixing the ingredients. Often, you’ll find coconut flour to have clumps, and that will change up the texture of the mug cake. 

Use lemon extract instead of lemon juice

Traditional lemon poppy seed muffins tend to use lemon juice, but I found for a small portion dessert, lemon extract works much better. It also prevents the texture changing, as a little too much lemon juice will need extra flour to compensate. 

Cook the mug cake in 30-second spurts 

Different brands and makes of microwaves will result in different cooking times. I recommend cooking your mug cake in 30-second spurts, so you can ensure it is fully cooked through, but not over-baked. 

Use blanched almond flour

Blanched almond flour, as opposed to super fine almond flour or almond meal, will yield a lighter, fluffier mug cake. It also won’t have any almond flavor, which is what we want from this recipe! 

2 Ingredient Sugar Free Glaze Recipe

Drizzle the top of your mug cake with this fool-proof sugar free glaze!

I used sugar free confectioners’ sugar, which has the same texture and flavor or normal confectioners sugar, minus the carbs, sugar, and calories. 

To make the 2-ingredient sugar free frosting, combine 2 tablespoons of the powdered sugar substitute with 1 teaspoon of milk. Slowly add more until your desired texture is achieved.

How to make the mug cake in the oven

For those who don’t use a microwave, you can easily make this mug cake in the oven or toaster oven,

Step 1: Preheat the oven to 180C/350F. Grease a small oven-safe ramekin or dish with cooking spray.

Step 2: Prepare your batter then transfer it to the greased ramekin/dish. 

Step 3: Bake for 12-15 minutes, or until a toothpick comes out clean from the center. 

Can you make this mug cake eggless and vegan? 

Making this mug cake eggless is easy, and can be made by either substituting the egg for ground chia seeds or unsweetened applesauce.

Please be wary that regardless of which option you choose, the mug cake won’t expand as much, and be quite moist in the center. 

Keto Lemon Poppy Seed Mug Cake Muffin
Easy 1-minute lemon poppy seed mug cake muffin

Healthy 1 Minute Lemon Poppyseed Muffin (Keto, Paleo, Vegan)

5 from 8 votes
This healthy lemon poppyseed muffin takes just one minute to make in the microwave but also comes with a tested oven option too! It’s moist and fluffy on the inside while being tender on the outside- A naturally gluten free, keto, paleo and sugar free recipe with a tested vegan option too!
Servings: 1 mug cake
Prep: 1 minute
Cook: 1 minute
Total: 2 minutes




For the microwave option

  • In a small bowl, combine the almond flour, coconut flour, granulated sweetener of choice, poppy seeds and baking powder and mix well.
  • In a separate small bowl, combine the dairy free milk with the egg (or flax egg) and whisk with the lemon extract. Add the mixture to the dry mixture and mix until just combined.
  • Grease a large mug or cereal bowl and pour the batter in it and microwave for at least 50 seconds, depending on the microwave.
  • While it’s cooling, make the icing by mixing all ingredients and drizzle over the top.

For the oven option

  • Follow directions as above but bake in an oven at 350 degrees for 12-15 minutes, until a toothpick comes out clean.


* Depending on the coconut flour you use, you may need less/more. Adjust accordingly


Serving: 1mug cakeCalories: 194kcalCarbohydrates: 6gProtein: 6gFat: 13gFiber: 4gVitamin A: 200IUVitamin C: 1.7mgCalcium: 30mgIron: 0.7mgNET CARBS: 2g
Course: Dessert
Cuisine: American
Author: Arman
Tried this recipe?Give us a shout at @thebigmansworld or tag #thebigmansworld!

Disclosure: This post may contain affiliate links. I may earn a small commission for my endorsement, recommendation, testimonial, and/or link to any products or services from this website.

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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  1. A completely comprehensible moral of a funny backstory, a sticky pun (which made me giggle) and a delicious looking muffin in the end. There are worse ways to start a Thursday morning!

    I love citrus in general. I add it to most of my spicy dishes. And I don’t hate it in desserts either. Hello Lemon Pound Cake, Key Lime Pie and Lemon Poppy Seed Muffins :-D…. Okay I think I am just really greedy in general 😛

    I fuel my hiking with complaints!

  2. Honestly, Starbucks lemon cake is one of my favorites. I love lemons so much, I can eat all lemon without sugar or honey, Just like that.

  3. I’m not a huge fan of citrus baked goods or desserts either but I love lemon poppy seed muffins, especially the giant ones from costco! Except the ones from costco are like 1000 calories and should not be eaten daily so i’d much rather stick to this version!

  4. Ahhhhhh Lemon Poppy Seed! The most underrated baked good flavor! I am such a big fan so it makes me sad that more people don’t go for lemony baked desserts. Happy you’re showing it some love today! Is almond flour the same as almond meal? If not, can coconut flour be used to replace the almond flour?

    1. It has a different texture but works when substituted tablespoon for tablespoon. If you use coconut flour, add a dash more liquid!

  5. Ummm have I ever mentioned that I love muffins? And lemon poppyseed? Haven’t had that flavor in forever though!!

  6. Ok I need to make this like right now. 1 minute??? I am so impatient, this is the perfect recipe for me.

  7. I’ve never been a fan of lemon flavoured things, but these sound divine!! So quick and easy….I’ll definitely give these a try 🙂 When I go on hikes, I make sure to pack apple slices and nut butter!

  8. I’ve always kind of glossed over citrus in desserts as well (hi, chocolate fiend), but the few times I’ve had them, I really did enjoy them. But hiking fuel will always and forever be dates, chocolate chips, and almonds. BOOM.

  9. I love it Arman! I just now made it with a couple of modifications. I was out of poppy seeds, so I left them out. I was too lazy to zest a lemon so I used about 1/8 tsp. lemon extract. I used 1 Tb. coconut sugar and a little stevia. It’s wonderful! Thanks for the recipe.

    1. Oh yay! Linda, that’s so funny, I just took out the hamburger casserole leftovers!

      Thanks for the feedback- Appreciate it 🙂

  10. I’m not actually a fan of citrus in general… At least I always say that, whenever David gives me a try of something citrusy I often like it! But if you placed this front of me right now I would happily tuck in – because I can’t imagine you making something I wouldn’t like! 🙂
    Hiking fuel = jerky and dates, the best snack combo!

  11. I’m soooooo pinning this. I have a seriously love affair for lemon baked goods. You are genius! I love this single serve decadence!!!

  12. You ate GAS STATION food? Haha just kidding. Sometimes you do what you gotta do. I’ve eaten gas station muffins before and I hate to admit that they’re super tasty. And lemon in baked goods is the bomb!