Imagine slicing into a warm, golden blondie that shatters lightly at the edges but stays impossibly fudgy in the center — the nutty depth of tahini weaving through every bite alongside pockets of toasted walnut and tiny shards of dark chocolate. These Mediterranean tahini blondies bring the soul of a Middle Eastern pastry shop into a single cast-iron skillet, and they happen to be completely sugar-free. A finishing shower of flaky Maldon sea salt and fragrant orange zest turns each square into something you would happily serve at a dinner party.

The macro profile reads like a keto dream. With roughly 46 grams of fat per serving — nearly all of it from whole-food sources like tahini, walnuts, butter, and almond flour — these blondies clock in at about 83 percent fat calories. Net carbs sit at just 8 grams per generous serving, keeping you firmly in ketosis territory. You also get a solid 15 grams of protein from the eggs, almond flour, and nuts, making this more than just empty sweetness.

Best of all, the entire recipe comes together in one 10-inch skillet with no mixer, no complicated steps, and barely any cleanup. Ten minutes of stirring, twenty-two minutes in the oven, and you have a batch of four thick servings ready to go. They hold up beautifully at room temperature for days, which makes them perfect for weekend meal prep or a make-ahead treat when cravings strike midweek.

Ingredients (serves 4)

For the blondie batter:

  • 1⅓ cups (130g) blanched almond flour
  • ¼ cup (60g) tahini, well stirred
  • ¼ cup (56g) unsalted butter, melted and slightly cooled
  • 2 large eggs, at room temperature
  • ½ cup (80g) granulated erythritol or monk fruit sweetener blend
  • 1 teaspoon pure vanilla extract
  • Zest of 1 small orange (about 1 tablespoon)
  • ½ teaspoon baking powder
  • ¼ teaspoon fine sea salt

For the mix-ins and topping:

  • ⅓ cup (40g) raw walnut pieces
  • 1 tablespoon (15g) dark chocolate chips or chopped bar, 85% cacao or higher
  • ½ tablespoon (7g) tahini, reserved for swirling
  • Flaky sea salt (such as Maldon), for finishing
  • Extra orange zest, for garnish (optional)

Instructions

  1. Preheat and toast. Set your oven to 350°F (175°C). Place a 10-inch (25cm) oven-safe skillet — cast iron works best — over medium heat. Add the walnut pieces and toast, stirring frequently, for 3 to 4 minutes until fragrant and lightly golden. Transfer the walnuts to a small bowl and set aside. Wipe the skillet clean but do not wash it; a thin film of walnut oil adds flavor.

  2. Mix the wet ingredients. In a medium mixing bowl, whisk together the melted butter, ¼ cup tahini, eggs, sweetener, vanilla extract, and orange zest until smooth and well combined. The mixture should look glossy and slightly thick.

  3. Combine with dry ingredients. Add the almond flour, baking powder, and fine sea salt directly into the wet mixture. Stir with a spatula until a thick, cohesive batter forms — about 30 seconds of mixing. Do not overwork it; a few small lumps are perfectly fine and help keep the blondies tender.

  4. Fold in the mix-ins. Reserve about 1 tablespoon of the toasted walnuts for topping. Fold the remaining walnuts and the dark chocolate chips into the batter with two or three gentle strokes.

  5. Fill the skillet. Grease the same skillet lightly with butter or a quick spray of avocado oil. Scrape the batter into the skillet and spread it into an even layer using the back of the spatula. The batter will be thick, which is exactly what you want for a dense, fudgy texture.

  6. Swirl and top. Drop small dollops of the reserved ½ tablespoon tahini across the surface of the batter. Use the tip of a knife or a toothpick to drag through the dollops in a zigzag pattern, creating a marbled swirl. Scatter the reserved walnut pieces over the top and press them in gently.

  7. Bake. Transfer the skillet to the center rack of the oven and bake for 20 to 22 minutes. The blondies are done when the edges are set and golden brown and the center is just barely firm — it will continue to set as it cools. A toothpick inserted into the center should come out with a few moist crumbs but no wet batter.

  8. Finish and cool. Remove the skillet from the oven and immediately sprinkle the surface with flaky sea salt and a light grating of fresh orange zest if desired. Let the blondies cool in the skillet for at least 15 minutes before slicing — they firm up significantly as they rest. Cut into 4 large squares or 8 smaller bars.

Nutrition per Serving

Nutrient Amount
Calories ~500 kcal
Fat ~46g
Protein ~15g
Total Carbs ~14g
Fiber ~6g
Net Carbs ~8g

Nutrition is approximate and calculated based on the stated ingredients using USDA data. Erythritol carbs are excluded from net carb totals as they have no glycemic impact.

Tips & Variations

Choose the right sweetener for the best texture. Granulated erythritol gives these blondies a slight crunch reminiscent of brown sugar, while an allulose-based sweetener produces a softer, chewier result since allulose does not crystallize. If you use pure monk fruit extract, reduce the amount drastically — it is roughly 200 times sweeter than sugar — and add 2 tablespoons of coconut flour to compensate for lost bulk.

Toast your walnuts — do not skip this step. Raw walnuts can taste slightly bitter and astringent. Toasting them for just a few minutes in the skillet before baking transforms them entirely, bringing out rich, buttery notes that complement the tahini beautifully. Pecans make an excellent substitute if you prefer a milder, sweeter nut flavor.

Let them cool for the cleanest slices. These blondies are intentionally fudgy, which means slicing them hot will give you a gooey, crumbly mess. Patience pays off — after 15 minutes of resting they firm up into clean, sliceable squares. For even neater cuts, refrigerate for 30 minutes and use a sharp knife wiped clean between slices.

Watch for hidden carbs in tahini and chocolate. Not all tahini is created equal — some brands add sugar or sweetened oils. Check labels and use a tahini made from 100 percent sesame seeds. Similarly, verify that your dark chocolate is genuinely 85 percent cacao or higher; anything lower can add 2 to 3 grams of extra net carbs per serving and potentially push you over your daily limit.

Store smart for up to five days. Keep leftover blondies in an airtight container at room temperature for up to 3 days, or refrigerate for up to 5 days. They taste wonderful cold — almost like fudge — straight from the fridge. You can also freeze individually wrapped squares for up to 2 months. Thaw at room temperature for 20 minutes or microwave for 15 seconds for a warm, melty center.

Frequently Asked Questions

Will these blondies knock me out of ketosis?
At 8 grams of net carbs per generous serving, these blondies fit comfortably within most ketogenic daily limits of 20 to 30 grams of net carbs. The sweetener used — erythritol or monk fruit blend — has zero glycemic impact and does not raise blood sugar or insulin levels in clinical studies. That said, everyone's carb tolerance varies. If you are following a strict therapeutic ketogenic protocol under 15 grams of net carbs per day, consider cutting each serving in half for a 4-gram net carb treat that still satisfies your sweet tooth without compromise.
Can I substitute the almond flour for something nut-free?
Yes, sunflower seed flour is the closest one-to-one swap for almond flour in this recipe. Use the same weight — 130 grams — and follow the instructions exactly. Be aware that sunflower seed flour can react with baking powder to produce a greenish tint due to chlorogenic acid; this is harmless and purely cosmetic. Adding a teaspoon of lemon juice to the batter neutralizes the reaction and keeps the blondies golden. You can also try a blend of toasted coconut flour (3 tablespoons) and ground flaxseed (¼ cup) for a nut-free alternative, though the texture will be slightly denser.
How should I store and reheat these for meal prep?
For weekly meal prep, bake the full skillet batch, let the blondies cool completely, then slice and wrap each piece individually in parchment paper before placing them in an airtight container. Refrigerated, they last up to 5 days and are perfectly enjoyable eaten cold, almost like dense fudge. For a warm experience, unwrap and microwave a single square for 12 to 15 seconds — any longer and the sweetener can become overly liquid. Frozen blondies keep for 2 months and thaw beautifully at room temperature in about 20 minutes.
Can I make these dairy-free or vegan keto?
For a dairy-free version, replace the butter with an equal weight of coconut oil — it produces a slightly firmer texture when chilled but tastes wonderful with the tahini and orange zest. For a fully vegan keto adaptation, swap the two eggs with flax eggs (2 tablespoons ground flaxseed whisked into 5 tablespoons warm water, rested for 10 minutes). The vegan version will be denser and more fudge-like rather than cakey, which many people actually prefer. Increase the baking time by 2 to 3 minutes since flax eggs set more slowly than chicken eggs.
My blondies came out dry — what went wrong?
The most common cause is overbaking. Because almond flour does not contain gluten, these blondies go from perfectly fudgy to dry very quickly — sometimes in as little as 2 extra minutes in the oven. Start checking at the 18-minute mark and pull them when the center still looks slightly underset and jiggles faintly when you shake the skillet. Residual heat from the cast iron will continue cooking the center as it cools. Another culprit is using almond meal instead of finely blanched almond flour; the coarser grind absorbs more moisture. Finally, make sure your tahini is fresh and well-stirred — old tahini with separated oil can throw off the fat content and leave the batter too dry.