Imagine snapping into a thin, golden cracker bursting with rosemary, oregano, and garlic — then dragging it through a lush, bright-green walnut-basil pesto that tastes like a sun-drenched Italian herb garden. These air fryer seed crackers deliver exactly that: a shattering crunch from a blend of almond flour, flaxseed, chia, and hemp hearts, seasoned with a generous handful of dried Italian herbs and a whisper of nutritional yeast for that savory, almost-cheesy depth. Every bite is intensely flavored, deeply satisfying, and completely plant-based.

With 24 grams of fat and only 4 grams of net carbs per serving, these crackers land squarely in the keto sweet spot. The combination of almond flour and three different seeds creates a nutrient-dense base rich in omega-3 fatty acids, while the walnut-heavy pesto pushes the fat content even higher without any dairy. At roughly 278 calories per serving, this is a snack that fuels you without kicking you out of ketosis.

The air fryer is the secret weapon here. It crisps the crackers in just 8 minutes — no preheating a full oven, no waiting around. You can mix the dough, roll it, cut it, and have warm crackers on the table in under 20 minutes. The pesto comes together in a food processor in seconds, and both components store beautifully, making this an ideal batch-prep snack for the week ahead.

Ingredients (serves 4)

For the seed crackers:

  • 3/4 cup (72g) almond flour
  • 2 tablespoons (14g) ground golden flaxseed
  • 2 tablespoons (20g) chia seeds
  • 2 tablespoons (20g) hemp hearts
  • 1 tablespoon (5g) nutritional yeast
  • 1 teaspoon dried Italian seasoning (oregano, basil, thyme blend)
  • 1/2 teaspoon dried rosemary, finely crushed
  • 1/2 teaspoon garlic powder
  • 1/4 teaspoon fine sea salt
  • 1/8 teaspoon freshly ground black pepper
  • 1 tablespoon (15ml) extra-virgin olive oil
  • 3 tablespoons (45ml) warm water

For the walnut-basil pesto:

  • 1/2 cup (50g) raw walnuts
  • 2 cups (40g) packed fresh basil leaves
  • 1 small clove garlic, roughly chopped
  • 2 tablespoons (10g) nutritional yeast
  • 2 tablespoons (30ml) extra-virgin olive oil
  • 1 tablespoon (15ml) fresh lemon juice
  • 2 tablespoons (30ml) water, plus more as needed
  • 1/4 teaspoon fine sea salt
  • Pinch of red pepper flakes (optional)

Instructions

  1. Make the cracker dough. In a medium mixing bowl, whisk together the almond flour, ground flaxseed, chia seeds, hemp hearts, nutritional yeast, Italian seasoning, crushed rosemary, garlic powder, salt, and black pepper until evenly combined. Drizzle in the olive oil and warm water, then stir with a fork until a cohesive dough forms. It should hold together when pressed but not feel sticky. Let the dough rest for 3 minutes so the chia and flax absorb the liquid and bind everything together.

  2. Roll and cut the crackers. Place the dough between two sheets of parchment paper. Roll it out to an even thickness of about 1/8 inch (3mm) — thin enough to crisp properly but thick enough to handle. Remove the top parchment sheet and use a knife or pizza cutter to score the dough into roughly 24 small rectangles or squares, about 1.5 inches (4cm) each. Don't worry about separating them yet; they'll snap apart after cooking.

  3. Preheat the air fryer. Set your air fryer to 325°F (163°C) and let it run for 2 minutes. This lower temperature is key — it allows the crackers to dry out and crisp evenly without burning the seeds on the surface.

  4. Air fry in batches. Carefully transfer the scored dough (still on the parchment) to the air fryer basket, trimming the parchment to fit. You will likely need to cook in two batches depending on your basket size. Air fry for 6 to 8 minutes, checking at the 5-minute mark. The crackers are done when they are golden brown at the edges and feel firm and dry to the touch. They will continue to crisp as they cool. Remove and let them cool on a wire rack for at least 5 minutes before snapping apart along the scored lines.

  5. Make the walnut-basil pesto. While the first batch of crackers is in the air fryer, add the walnuts, basil, garlic, nutritional yeast, olive oil, lemon juice, water, salt, and red pepper flakes to a food processor. Pulse 15 to 20 times, scraping down the sides as needed, until you reach a thick but spreadable consistency. The pesto should have some texture — don't over-process it into a smooth paste. Taste and adjust the salt, lemon, or pepper flakes to your preference. Add an extra tablespoon of water if it seems too thick.

  6. Serve and enjoy. Arrange the cooled crackers on a plate alongside a small bowl of the walnut-basil pesto for dipping. Each serving is approximately 6 crackers with 2 tablespoons of pesto.

Nutrition per Serving

Nutrient Amount
Calories ~278 kcal
Fat ~24g
Protein ~8g
Total Carbs ~9g
Fiber ~5g
Net Carbs ~4g

Nutrition is approximate and calculated based on the stated ingredients and 4 servings.

Tips & Variations

Roll them thin for maximum crunch. The single most important factor for crispy crackers is thickness. Aim for 1/8 inch or even slightly thinner. If you roll them too thick, they'll be chewy in the center instead of snapping cleanly. Use firm, even pressure and the parchment paper trick to prevent sticking.

Toast the walnuts for deeper pesto flavor. For an even richer, more complex pesto, toast the walnuts in a dry skillet over medium heat for 3 to 4 minutes before processing. This brings out their natural oils and adds a roasty depth that pairs beautifully with the fresh basil. Just watch them closely — walnuts burn quickly.

Watch for hidden carbs in seasoning blends. Some store-bought Italian seasoning mixes contain added sugar, maltodextrin, or starch as fillers. Always check the label and opt for a blend that lists only dried herbs. Better yet, mix your own with equal parts dried oregano, basil, and thyme.

Add sun-dried tomatoes for an Italian twist. Stir 1 tablespoon of finely chopped oil-packed sun-dried tomatoes into the cracker dough for a burst of umami sweetness. This adds roughly 0.5g net carbs per serving but delivers a big flavor upgrade. Make sure to use oil-packed rather than dry-packed, as the oil helps keep the crackers tender.

Swap the nut if needed. If walnuts aren't your thing, the pesto works beautifully with pine nuts, pecans, or even pumpkin seeds. Pine nuts give the most traditional Italian flavor, while pecans add a subtle sweetness. The macros will shift slightly, but all of these options keep the pesto firmly in keto territory.

Frequently Asked Questions

How do these crackers fit into a standard keto macro split?
Each serving delivers roughly 278 calories with about 77% of those calories coming from fat, 12% from protein, and 11% from total carbs — but only 4 grams of net carbs after subtracting the 5 grams of fiber. This is well within the typical keto guideline of staying under 20 to 25 grams of net carbs per day. The high fiber content from chia seeds, flaxseed, and hemp hearts makes the net carb count impressively low while keeping you satiated between meals.
Can I substitute the almond flour for a nut-free option?
Yes — sunflower seed flour is the best nut-free substitute and works at a 1:1 ratio. Be aware that sunflower seed flour can react with baking soda and turn greenish, but since this recipe doesn't use any leavening agents, that won't be an issue here. You could also try a blend of extra ground flaxseed and hemp hearts, though the texture will be slightly more crumbly. If going fully nut-free, swap the walnuts in the pesto for toasted pumpkin seeds or sunflower seeds.
How should I store the crackers and pesto, and how long do they last?
Store the cooled crackers in an airtight container at room temperature for up to 5 days. They actually improve over the first day as they dry out further and become even crispier. If they soften, pop them back in the air fryer at 300°F (150°C) for 2 minutes to re-crisp. The pesto should be stored separately in a sealed jar in the refrigerator, where it will keep for up to 5 days. Press a thin layer of olive oil over the surface before sealing to prevent browning.
This recipe is already vegan keto — can it be adapted for lacto-ovo vegetarian keto?
Absolutely. If you eat dairy, you can replace the nutritional yeast in both the crackers and pesto with finely grated Parmigiano-Reggiano for a more authentic Italian flavor. Use 2 tablespoons of grated Parmesan in the crackers and 3 tablespoons in the pesto. You could also add a tablespoon of softened butter to the cracker dough in place of the olive oil for an even richer flavor and slightly more tender texture. These swaps won't significantly change the macro profile.
My crackers came out soft and chewy instead of crispy — what went wrong?
The most common cause is rolling the dough too thick. Anything over 1/8 inch will struggle to crisp all the way through in the air fryer. The second most common issue is not letting the dough rest before rolling — the chia and flax need those 3 minutes to absorb the water and bind properly, which allows you to roll thinner without cracking. Finally, make sure your air fryer is actually at 325°F; some models run cool. If they're still soft after 8 minutes, continue cooking in 1-minute intervals, checking each time, until they feel dry and firm across the entire surface.