Keto Lemon Poppyseed Muffin in a Mug

When you want something warm, lemony, and fast, this Keto Lemon Poppyseed Muffin in a Mug gets the job done in right around 3 minutes. It keeps the ingredient list short, the carb count low, and the cleanup blessedly small.

We tend to use eight-ounce wide mouth mason jars for our mug mixes. If you add a plastic cap you write the finishing directions right on the top of the jar with a dry-erase marker and simply wash it off with a clean dishcloth after you use the mix. The mug cake mix can be cooked right in the jar!

Mug mixes are handy to make ahead because they take up very little pantry space and only need a couple of wet ingredients when you’re ready to cook. If you like keeping single-serve options on hand, this one gives you bright lemon flavor, a tender crumb, and just enough poppy seed crunch to keep things interesting.

Ingredients for Keto Lemon Poppyseed Muffin in a Mug

This single-serving muffin uses a short list of low-carb pantry basics. The almond flour gives it body, the coconut flour helps soak up moisture, and the lemon extract does the heavy lifting for that bright citrus flavor.

• 1 tablespoon almond flour
• 1 1/2 tablespoons coconut flour, sifted
• 1 to 2 tablespoons Bocha Sweet or granulated sweetener of choice
• 1 teaspoon poppy seeds
• 1/2 teaspoon baking powder
• 1/2 to 1 teaspoon lemon extract
• 1 large egg
• 1 tablespoon half-and-half or heavy cream, or 1 tablespoon lemon juice

Glaze

• 2 tablespoons powdered Bocha Sweet or Swerve
• 1 teaspoon milk of choice

If you want more lemon flavor without adding extra liquid, use the full teaspoon of extract. If you prefer a sharper citrus bite, use the tablespoon of lemon juice in place of the cream.

For keto baking, superfine almond flour gives you the best texture. If you’d like a deeper look at the differences, Choosing the Best Almond Flour for Keto Recipes can save you from a gritty muffin and a mild kitchen sulk.

🔗 Back to Menu

How to Make Keto Lemon Poppyseed Muffin in a Mug

You can prep the dry mix ahead in a bag or small jar, then finish it when you’re ready to eat. An 8-ounce wide-mouth mason jar works especially well for storing the mix.

Prepare the mug mix

1. Combine the almond flour, coconut flour, sweetener, poppy seeds, and baking powder in a zip-close bag or 8-ounce wide-mouth mason jar.
2. Stir or shake well so the dry ingredients are evenly blended.
3. Attach the cooking directions to the container, or write the finishing directions on the lid if you’re using a reusable cap.

Microwave directions

1. Grease a large microwave-safe mug or an 8-ounce wide-mouth mason jar.
2. Add the egg, lemon extract, cream or lemon juice, and the prepared dry mix.
3. Stir just until the dry ingredients are moistened and combined. Don’t overmix.
4. Microwave for 50 to 60 seconds, depending on your microwave.
5. Let the muffin cool briefly.
6. Mix the powdered sweetener and milk of choice to make the glaze, then drizzle it over the warm muffin.

Oven directions

1. Grease an oven-safe ramekin.
2. Mix the egg, extract, cream or lemon juice, and dry mix just as you would for the microwave version.
3. Bake at 350 degrees F for 10 to 12 minutes, or until a toothpick comes out clean.
4. While the muffin bakes, stir together the powdered sweetener and a few drops of milk, almond milk, heavy cream, or water for the glaze.
5. Drizzle the glaze over the warm muffin and serve.

Microwave cooking can heat egg dishes unevenly, so make sure the center is set before eating. For food safety, egg dishes cooked in the microwave should reach 165 degrees F and stand briefly after cooking, according to the FDA’s microwave egg safety guidance.

🔗 Back to Menu

Helpful Tips for the Best Mug Muffin

Sift the coconut flour if it’s clumpy. Coconut flour likes to hold tiny lumps, and those dry pockets can leave you with a muffin that looks done but tastes dusty.

Use a larger mug than you think you need. The batter rises as it cooks, and a too-small mug can turn your quick breakfast into a microwave cleaning project.

Don’t overmix. Stir only until the batter comes together. Too much mixing can make the finished texture rubbery, especially in a single-serve microwave bake.

Let it sit for a minute after cooking. That short rest helps the crumb finish setting so it tastes like a muffin instead of a very optimistic scrambled egg.

If mug baking is your thing, Lemon Cake Mix in a Mug is another quick option to keep in the pantry rotation.

🔗 Back to Menu

Easy Variations and Substitutions

You can tweak this mug muffin without changing its basic method.

• Use lemon juice instead of cream for a brighter, tangier flavor.
• Swap the glaze liquid with almond milk, heavy cream, milk, or even a few drops of water.
• Adjust the sweetness by staying closer to 1 tablespoon for a less sweet muffin or using 2 tablespoons for a dessert-style version.
• Skip the glaze if you want a simpler breakfast muffin with fewer sweetener ingredients.
• Top it with keto lemon curd if you want to lean all the way into the lemon. Keto Lemon Curd makes a great finishing spoonful.

What you shouldn’t swap casually is the flour ratio. Almond flour and coconut flour behave very differently, so changing one without adjusting the other usually gives you either a soggy center or a dry brick. Neither one deserves a glaze.

🔗 Back to Menu

Storage and Make-Ahead

This recipe is especially handy as a make-ahead dry mix. Store the dry mix in an airtight jar or zip-close bag in a cool, dry place for up to 3 months as an estimate for best quality. That’s a practical pantry window based on the shortest-lived dry ingredient and the fact that nut and coconut flours can lose freshness faster than standard wheat flour.

If your kitchen runs warm, refrigerating the dry mix will help protect the almond and coconut flours from turning stale or rancid. Check the mix before using it. If it smells bitter, sour, or oily, toss it.

Once cooked, the prepared muffin should be cooled, covered, and refrigerated within 2 hours. Store leftovers in the refrigerator for up to 3 to 4 days. That’s a conservative food-safety window for cooked egg-containing leftovers.

You can also freeze the cooked muffin for up to 2 months for best quality. Wrap it well, then thaw overnight in the refrigerator or reheat gently in short microwave bursts.

🔗 Back to Menu

Serving Suggestions

This muffin works as a quick breakfast, a midafternoon snack, or a small dessert when you want something sweet without making a full batch. Serve it warm so the glaze softens into the top a bit instead of sitting there like a cold patch job.

• Pair it with coffee or hot tea for breakfast.
• Add a spoonful of keto lemon curd for a dessert-style finish.
• Serve it with a side of berries if your carb budget allows.
• Make it alongside eggs or sausage if you want a more filling keto breakfast plate.

🔗 Back to Menu

Prepare the Mug Mix

In a zip-close bag or 8oz wide mouth mason jar, combine the almond flour, coconut flour, sweetener of choice, poppy seeds, and baking powder and mix well. Attach a label to the jar with cooking directions, or just write the finishing directions directly on the bag.

💸 Budget101® Price Breakdown: Keto Lemon Poppyseed Muffin in a Mug

🛒 Walmart Grocery List

• Almond Flour, 16 oz
• Coconut Flour, 16 oz
• Granular Sweetener, 12 oz
• Poppy Seeds, 2.37 oz
• Baking Powder, 8.1 oz
• Lemon Extract, 2 fl oz
• Eggs, 12 count
• Half and Half, 1 Pint
• Powdered Sweetener, 12 oz
• Milk, 1 Gallon

Not sure exactly what this batch costs you per serving? Here’s how to break down the real cost of any recipe so you know before you shop.

Frequently Asked Questions about Keto Lemon Poppyseed Muffin in a Mug

📌 Love this Keto Lemon Poppyseed Muffin in a Mug? Pin it!

🖨️ Print-Friendly Keto Lemon Poppyseed Muffin in a Mug

Keto Lemon Poppyseed Muffin in a Mug

Article or recipe authorAuthor: Melissa 'Liss' Burnell

(Click on the stars to vote!)

Pinterest Facebook Email

Share

Print SaveGo to Collections PDF

preparation timePrep 5 minutes mins

cook timeCook 1 minute min

total timeTotal 6 minutes mins

This single-serve keto lemon poppyseed muffin makes one quick breakfast or snack with bright lemon flavor and a tender, lightly glazed crumb. Estimated total cost is $1.91 per mug muffin, or about $1.91 per serving, depending on the sweetener and dairy you use.

ServingsServings 1 servings

CourseCourse bread, Breakfast, Dessert, Snack

CuisineCuisine American

Budget101 Price BreakdownApprox Cost: $1.91

Ingredients

1/21x2x

• ▢ 1 tablespoon almond flour
• ▢ 1 ½ tablespoons coconut flour sifted
• ▢ 1 to 2 tablespoons Bocha Sweet or granulated sweetener of choice
• ▢ 1 teaspoon poppy seeds
• ▢ ½ teaspoon baking powder
• ▢ ½ to 1 teaspoon lemon extract
• ▢ 1 large egg
• ▢ 1 tablespoon half-and-half or heavy cream or 1 tablespoon lemon juice
• ▢ 2 tablespoons powdered Bocha Sweet or Swerve
• ▢ 1 teaspoon milk of choice

Equipment

8-ounce wide-mouth mason jar or zip-close bag

Large microwave-safe mug or oven-safe ramekin

Small mixing spoon

Measuring Spoons

Instructions

Prevent Sleep Mode Prevent Sleep Mode

1. In a zip-close bag or 8-ounce wide-mouth mason jar, combine the almond flour, coconut flour, sweetener, poppy seeds, and baking powder. Mix well.
2. Grease a large microwave-safe mug or an 8-ounce wide-mouth mason jar.
3. Add the egg, lemon extract, cream or lemon juice, and the prepared dry mix. Stir just until moistened and combined.
4. Microwave for 50 to 60 seconds, depending on your microwave.
5. While the muffin cools briefly, stir together the powdered sweetener and milk of choice to make the glaze.
6. Drizzle the glaze over the warm muffin and serve.
7. For oven preparation, grease an oven-safe ramekin and bake at 350 degrees F for 10 to 12 minutes, or until a toothpick comes out clean. Glaze as directed.

Recipe Size Alteration

💡 If you altered the ingredients above by doubling or tripling the recipe, you may also need to change the pan/dish size and adjust the cook time.

Notes

Cost estimate is based on researched current online ingredient prices and the mid-range use of 1 1/2 tablespoons granulated sweetener, 3/4 teaspoon lemon extract, 1 tablespoon heavy cream, and 1 teaspoon milk.
Prep time is estimated from the stated steps.
Cook time reflects the microwave version. Oven baking takes 10 to 12 minutes.
This recipe makes 1 mug cake, which is 1 serving.
Store the dry mix in an airtight container in a cool, dry place for up to 3 months for best quality, or refrigerate if your kitchen runs warm.
Refrigerate the cooked muffin within 2 hours and use within 3 to 4 days.

Tried this recipe?

Let us know how it was!