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Air Fryer Savory Keto Almond Flour Biscotti with Rosemary and Parmesan

By Airfryfeast Test KitchenReviewed by Airfryfeast Editorial TeamPublished Apr 6, 2026 · Updated May 12, 2026
Italian 28 mins air-fryer-friendlylow-carbketogluten-freedairy-freehealthycrispeasysnackablefamily-friendly30-minutes-or-lessbudget-friendly

Savor this crunchy, low-carb keto almond flour biscotti infused with fragrant rosemary and sharp Parmesan cheese. Air-fried in under 30 minutes, this gluten-free and dairy-free friendly biscotti is an easy, healthy, and family-friendly snack or appetizer that's perfectly crisp and budget-friendly.

Air Fryer Savory Keto Almond Flour Biscotti with Rosemary and Parmesan
Prep 10 min
Cook 18 min
Total 28 min
Servings 12
Difficulty easy
Cuisine Italian

Recipe Details

Prep10 min
Cook18 min
Total28 min
Servings12
Difficultyeasy
CuisineItalian
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Ingredients

Servings 12
  • 2 cups almond flour (finely ground)
  • 1/4 cup grated Parmesan cheese (or dairy-free Parmesan substitute)
  • 1 tsp gluten-free baking powder
  • 1/2 tsp sea salt
  • 1 tbsp fresh rosemary, finely chopped
  • 2 large eggs
  • 2 tbsp extra virgin olive oil
  • 1/2 tsp garlic powder
  • 1/4 tsp black pepper

Instructions

  1. Preheat air fryer to 320°F (160°C) for 5 minutes.
  2. In a large bowl, mix almond flour, Parmesan cheese, baking powder, sea salt, rosemary, garlic powder, and black pepper until combined.
  3. In a separate bowl, whisk eggs and olive oil until smooth.
  4. Add wet ingredients to dry and mix thoroughly until a sticky dough forms that holds together when pressed.
  5. Shape dough into a 10-inch long, 2-inch wide log on parchment paper.
  6. Carefully transfer the dough log to the air fryer basket; cut in half if needed to fit without overcrowding.
  7. Air fry at 320°F (160°C) for 12 minutes.
  8. Remove and let cool on a wire rack for 5 minutes.
  9. Slice the log diagonally into 1/2-inch thick biscotti using a sharp serrated knife.
  10. Place biscotti slices cut-side down in a single layer in the air fryer basket.
  11. Air fry for an additional 6 minutes, flipping halfway, until golden brown and crisp.
  12. Cool completely on a wire rack before serving for maximum crunch.
  13. Store leftovers in an airtight container at room temperature for up to 5 days.

Frequently Asked Questions

Reader questions and answers for this recipe will appear here.

Customize your Air Fryer Savory Keto Almond Flour Biscotti with these ingredient substitutions for dietary needs or ingredient availability:

  • Almond Flour: Replace with finely ground hazelnut flour or sunflower seed flour to vary the nutty flavor, maintaining keto and gluten-free status.
  • Parmesan Cheese: Use dairy-free Parmesan made from nutritional yeast and nuts to keep the biscotti vegan and dairy-free.
  • Baking Powder: Ensure it’s certified gluten-free, or substitute with cream of tartar and baking soda mix.
  • Fresh Rosemary: Use dried rosemary at half the amount if fresh isn’t available.
  • Olive Oil: Substitute avocado oil or melted coconut oil for alternative flavors and healthy fats.
  • Eggs: For vegan biscotti, replace each egg with a flaxseed egg (1 tbsp ground flaxseed mixed with 3 tbsp water and rested).

These swaps keep the biscotti low-carb, gluten-free, dairy-free, keto, and vegan-friendly while preserving their crisp texture and savory essence, ideal for easy, family-friendly, and quick snacks or appetizers.

Air Fryer Model Notes

The air fryer model you use for this savory keto almond flour biscotti influences cooking time and texture. Smaller baskets may require cutting the dough log into smaller portions to avoid overcrowding and ensure even heat circulation for consistent crispness. Larger or higher-wattage air fryers might reduce cooking time, so monitor biscotti closely during both air-fry steps to prevent over-browning.

Precise temperature settings of 320°F (160°C) and accurate timers help dry out the biscotti gently, achieving a crunchy texture without burning the almond flour or herbs. Fans with strong convection airflow can crisp the biscotti faster, so keep slices in a single layer and flip midway during the second cook for uniform browning.

If your air fryer includes racks or trays for multi-level cooking, you can cook more biscotti at once but watch for uneven heat distribution between levels. Adjust timing as needed based on your model’s performance. Testing and adapting heat and timing will ensure perfectly crisp and flavorful biscotti customized for your air fryer.

Crispiness Control

For ideal crispiness in these savory keto almond flour biscotti, use your air fryer’s heat circulation wisely. The recommended double air fry technique—first cooking the dough log, then slicing and air frying again—creates a crisp golden crust with a tender center.

For extra crunchy, drier biscotti, extend the second air fry session by 1-2 minutes per side and consider lowering the temperature slightly to 300°F (150°C) to evenly evaporate moisture without burning. For softer biscotti or when using a dairy-free Parmesan substitute, reduce the second cook time by 1-2 minutes and allow the biscotti to cool fully; they will firm up during cooling due to low moisture content in almond flour.

Use parchment paper during the first air fry and avoid stacking slices during the second bake to ensure even airflow and consistent crisping. These gluten-free, keto-friendly biscotti achieve superb crispness without excess fat thanks to the almond flour base and olive oil.

Reheat your Air Fryer Savory Keto Almond Flour Biscotti for a fresh, crunchy snack using your air fryer.

How to Reheat:

  1. Preheat air fryer to 300°F (150°C) for 3-5 minutes.
  2. Arrange biscotti slices in a single layer inside the basket without overlapping for even airflow.
  3. Air fry for 3-5 minutes, checking at 3 minutes to avoid over-toasting.
  4. Flip slices halfway through to ensure uniform crispness.
  5. Remove when warmed and crisp to your preference, then cool briefly before serving.

Tips for Best Results:

  • Reheat in batches if necessary to avoid overcrowding.
  • Monitor closely, as thin biscotti toast quickly.
  • Store biscotti in an airtight container at room temperature for up to 5 days prior to reheating.
  • This method preserves the nutty almond flavor, rosemary aroma, and sharp Parmesan crispness.

This reheating approach maintains the gluten-free, keto, and dairy-free qualities of your biscotti, ensuring a perfect crunchy keto snack every time.

What To Serve With This In The Air Fryer

Pair your Air Fryer Savory Keto Almond Flour Biscotti with other low-carb, gluten-free, air fryer favorites for a satisfying snack or appetizer spread:

  • Air Fryer Marinated Olives: Savory olives with garlic and herbs offer a briny complement.
  • Air Fryer Parmesan-Crusted Zucchini Chips: Light, crisp zucchini chips continue the parmesan herb theme while keeping it keto.
  • Air Fryer Stuffed Mushrooms: Mushrooms filled with cream cheese, herbs, and parmesan make a hearty, family-friendly pairing.
  • Aromatic Hot Tea or Herb-Infused Broth: These warm beverages balance the crisp biscotti and enhance rosemary’s herbal notes.

These sides keep your snack low-carb, dairy-free friendly (using vegan Parmesan if desired), and deliciously crisp, perfect for keto-friendly boards or quick appetizers that are easy to prepare in your air fryer.

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