These air fryer black sesame coconut shortbread bites shatter into buttery, nutty crumbles the moment you bite in, revealing a deep, toasty sesame flavor that lingers beautifully alongside sweet, fragrant coconut. The matcha drizzle adds a gently bitter, earthy contrast that makes every piece feel like something you would find in a Japanese patisserie. They are crispy on the outside, tender in the center, and impossibly satisfying for a cookie with zero animal products and almost no carbs.

Each serving delivers 38 grams of fat from coconut oil and black sesame paste, keeping you firmly in ketosis with only 5 grams of net carbs. The combination of coconut flour and sesame provides a modest 5 grams of plant protein, and the high fat-to-carb ratio means these bites function as proper keto fuel, not just empty sweetness. At roughly 390 calories per three-cookie serving, they hit the macro sweet spot where indulgence and nutrition overlap.

The air fryer is the secret weapon here. It crisps the outside of each shortbread round in just 10 to 12 minutes while keeping the interior soft and crumbly, all without heating up your kitchen. The entire recipe comes together in well under 30 minutes, and the dough requires no chilling. Make a batch for the week ahead or whip them up whenever a craving strikes.

Ingredients (serves 4)

For the shortbread dough:

  • 1/2 cup (56g) coconut flour
  • 1/4 cup (60g) black sesame paste (or black tahini)
  • 1/4 cup (55g) coconut oil, softened but not melted
  • 3 tablespoons (25g) powdered erythritol or monk fruit sweetener blend
  • 2 tablespoons (14g) unsweetened desiccated coconut
  • 1 tablespoon (7g) ground flaxseed mixed with 2 1/2 tablespoons (37ml) warm water (flax egg)
  • 1/2 teaspoon vanilla extract
  • 1/8 teaspoon fine sea salt

For the matcha drizzle:

  • 3 tablespoons (45ml) full-fat coconut cream, chilled and thick
  • 1 teaspoon culinary-grade matcha powder
  • 1 tablespoon (8g) powdered erythritol or monk fruit sweetener blend

For garnish:

  • 1 teaspoon white sesame seeds
  • 1 teaspoon black sesame seeds

Instructions

  1. Prepare the flax egg. Stir together the ground flaxseed and warm water in a small bowl. Set aside for 5 minutes until it thickens into a gel-like consistency. This acts as your vegan binder.

  2. Mix the dough. In a medium bowl, combine the softened coconut oil, black sesame paste, and powdered sweetener. Stir vigorously with a fork or spatula until smooth and well blended, about 1 minute. Add the flax egg and vanilla extract and stir to combine.

  3. Add the dry ingredients. Sift the coconut flour into the wet mixture and add the desiccated coconut and salt. Fold everything together until a thick, slightly crumbly dough forms. If it feels too dry, add warm water one teaspoon at a time. If too sticky, add a light dusting of coconut flour. The dough should hold together when pressed.

  4. Shape the shortbread. Divide the dough into 12 equal portions, roughly 1 tablespoon each. Roll each portion into a ball, then flatten gently into a disc about 1/2 inch (1.25cm) thick. The cookies will not spread much in the air fryer, so press them to your desired final shape.

  5. Preheat the air fryer. Set your air fryer to 325°F (163°C) and let it run for 2 minutes. Cut a piece of parchment paper to fit the basket, poking a few holes for airflow.

  6. Air fry the shortbread. Place the discs on the parchment in the air fryer basket, leaving about 1/2 inch (1.25cm) of space between each. You may need to work in two batches of six. Air fry for 10 to 12 minutes, checking at 8 minutes. The shortbread is done when the edges are firm and golden-brown and the tops look dry and set. They will feel slightly soft in the center but will firm up as they cool.

  7. Cool completely. Carefully transfer the shortbread to a wire rack and let them cool for at least 10 minutes. They are fragile when warm and will crisp up significantly as they reach room temperature.

  8. Make the matcha drizzle. While the cookies cool, whisk together the chilled coconut cream, matcha powder, and powdered sweetener in a small bowl until smooth and vibrant green. The mixture should be thick but pourable. If it is too thick, add coconut cream half a teaspoon at a time.

  9. Finish and serve. Drizzle the matcha glaze over the cooled shortbread in thin lines using a fork or a small spoon. Immediately sprinkle with the white and black sesame seeds before the drizzle sets. Allow the glaze to firm up for 5 minutes, then serve.

Nutrition per Serving

Nutrient Amount
Calories ~390 kcal
Fat ~38g
Protein ~5g
Total Carbs ~10g
Fiber ~5g
Net Carbs ~5g

Nutrition values are approximate and based on the stated ingredients. Actual values may vary depending on specific brands and measurements used.

Tips & Variations

Choose the right sesame paste. Look for black sesame paste (sometimes labeled black tahini) that is made from 100 percent ground roasted black sesame seeds with no added sugar. Many Asian grocery stores carry it, or you can order it online. If you can only find regular tahini, the flavor will be milder and the color less dramatic, but the recipe will still work beautifully.

Watch your sweetener math. Erythritol and monk fruit blends can vary widely in sweetness. If using pure monk fruit extract, start with just half a teaspoon and taste the dough before shaping. Avoid maltitol-based sweeteners, which spike blood sugar and add hidden net carbs. Powdered sweetener works best here because it dissolves more evenly than granulated, preventing a gritty texture.

Store for the week ahead. Keep the shortbread in an airtight container at room temperature for up to 4 days or in the refrigerator for up to 8 days. For longer storage, freeze them without the matcha drizzle for up to 6 weeks, then add the glaze after thawing. They actually taste wonderful chilled straight from the fridge, almost like a fat bomb with a cookie crunch.

Swap the matcha for other glazes. If matcha is not your thing, try mixing the coconut cream with 1 teaspoon of cacao powder and sweetener for a chocolate version, or stir in a drop of pandan extract for a Southeast Asian twist. You could also skip the drizzle entirely and roll the warm cookies in a mixture of powdered sweetener and a pinch of five-spice powder.

Boost the coconut flavor. For an even more intensely coconut-forward cookie, toast the desiccated coconut in the air fryer at 300°F (149°C) for 2 to 3 minutes before adding it to the dough. Watch it closely because it goes from golden to burnt very quickly. You can also add 1/4 teaspoon of coconut extract alongside the vanilla for a double coconut punch.

Frequently Asked Questions

Are these shortbread bites truly keto-friendly?
Yes, each three-cookie serving contains only 5 grams of net carbs, which fits comfortably within most keto daily limits of 20 to 25 grams. The majority of calories come from fat, specifically coconut oil and black sesame paste, which together provide 38 grams of fat per serving. Erythritol and monk fruit sweeteners have zero glycemic impact and do not count toward net carbs. Just be sure to verify your specific sweetener brand does not include maltodextrin or dextrose as fillers, since those do raise blood sugar.
Can I substitute the coconut flour for almond flour?
You can, but the swap is not one-to-one. Coconut flour absorbs far more liquid than almond flour, so you would need roughly three times as much almond flour, approximately 1 1/2 cups (168g), and you should omit the flax egg since the dough will already hold together with the extra volume. The texture will be slightly less crumbly and more like a traditional shortbread. Net carbs will stay similar since almond flour is also very low-carb, though total fat per serving will increase slightly. The cookies may also need an extra 2 to 3 minutes in the air fryer.
How should I reheat leftover shortbread?
For the best texture, pop them back in the air fryer at 300°F (149°C) for 2 to 3 minutes. This re-crisps the exterior without drying out the center. You can also eat them at room temperature or straight from the fridge, where they take on a dense, fudgy quality that many people prefer. Avoid microwaving them, as the coconut oil will melt and make the cookies soft and greasy rather than crisp. If they have the matcha drizzle, the glaze may soften slightly when reheated but will set again as they cool.
How do I make these nut-free for someone with allergies?
This recipe is already completely nut-free as written. Coconut is classified as a fruit by the FDA, not a tree nut, though some individuals with tree nut allergies may also react to coconut, so check with your allergist. Black sesame paste and all other ingredients are seed-based or plant-based. If you need to avoid sesame as well, you could substitute sunflower seed butter for the sesame paste, though you will lose the distinctive black sesame flavor and color. The matcha drizzle is naturally free of all major allergens.
Why did my shortbread come out too soft or crumbly?
The most common cause is coconut oil that was too warm when mixed into the dough. If the oil is fully melted rather than just softened, the dough becomes greasy and the cookies spread and stay soft. Scoop the oil when it is at a soft butter-like consistency. Another factor is coconut flour freshness. Older coconut flour absorbs less moisture, so the dough may be too wet. Add an extra tablespoon of coconut flour if your dough feels sticky. Finally, let the cookies cool completely on the rack before handling. They firm up dramatically in the first 10 minutes after leaving the air fryer and will feel much more structured once fully cool.