Keto Lemon Poppy Seed Muffins Recipe — Low-Carb, Moist & Zesty

Keto lemon poppy seed muffins put a bright, citrus twist on the classic recipe. These gluten-free, low-carb muffins are moist, flavorful, and made with healthy fats—perfect for breakfast, a snack, or dessert.

Looking for a sweet treat that won’t derail your low-carb goals? These muffins deliver big lemon flavor with just 3g net carbs per serving.

They’re quick to mix and bake, and the simple lemon glaze adds a bright finishing touch.

These muffins work well for meal prep or to serve at a gathering—rich in texture and naturally sweetened for a clean, sugar-free bite.

This recipe was inspired by my low-carb lemon blueberry cheese danish muffins and adapted to keep carbs low while maximizing lemon flavor and moisture.

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Below you’ll find the ingredient list, step-by-step instructions, substitution ideas, storage tips, and the printable recipe card. Follow the directions for consistent, tender muffins every time.

Ingredients

Lemon Poppy Seed Muffins

• 3 large eggs
• ½ cup full-fat sour cream
• ¼ cup lemon juice (fresh is best)
• ½ tablespoon finely grated lemon zest
• 1 teaspoon lemon extract (optional, for extra lemon punch)
• ½ teaspoon vanilla extract
• ⅔ cup granular low-carb sweetener (monk-fruit/allulose blend or similar)
• 2 cups blanched super-fine almond flour
• ⅛ teaspoon sea salt
• 2 teaspoons baking powder
• 1 tablespoon poppy seeds

Lemon Glaze

• ⅓ cup low-carb powdered sweetener
• 1½ tablespoons lemon juice

See the printable recipe card below for nutrition, serving size, and a concise instruction summary.

Instructions

Preheat the oven to 350°F (180°C). Line a 12-cup muffin pan with liners and grease them, or use a greased silicone pan.

In a large bowl, whisk together almond flour, granular sweetener, sea salt, lemon zest, baking powder, and poppy seeds until evenly combined and lump-free. Set aside.

In a medium bowl, whisk the eggs, sour cream, lemon juice, lemon extract, and vanilla until smooth.

Add the wet mixture to the dry ingredients and stir until fully combined and smooth. Avoid overmixing.

Divide the batter evenly among the muffin cups, filling each about two-thirds full.

Bake for 25–30 minutes, or until the tops are golden and a toothpick inserted in the center comes out clean. Cool in the pan for 10 minutes before transferring to a rack.

Whisk the powdered sweetener and lemon juice together until smooth. Adjust the consistency with a few drops of water or more powdered sweetener if needed.

Drizzle the glaze over cooled muffins and let it set for a few minutes before serving.

Hint: Start checking with a toothpick at 20–25 minutes if your oven runs hot. The tops should be golden and a tester should come out clean.

Substitutions

• Lemon juice – If you don’t have fresh lemons, lemon juice concentrate will work in a pinch, though fresh juice gives the brightest flavor.
• Sour cream – Full-fat Greek yogurt can be substituted for a similar texture and tang.
• Sweetener – Use a like-for-like swap of granular and powdered low-carb sweeteners (erythritol/allulose/monk fruit blends) keeping volume adjustments in mind.

Storage

Store muffins in an airtight container at room temperature for up to 3 days or refrigerate for up to 7 days. Warm briefly in the microwave (about 10 seconds) before serving, if desired.

Equipment

• Muffin pan (12-cup)
• Microplane or lemon zester
• Juicer (optional)

📖 Printable Recipe Card

Related

Try these other lemon-forward low-carb recipes if you enjoyed these muffins:

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6 Evidence-Based Health Benefits of Lemons