30-Minute Sourdough Discard Black Garlic and Miso Crackers
Crispy, intensely savory crackers made with sourdough discard and umami-rich black garlic and miso paste. These elegant Asian-fusion crackers are ready in just 30 minutes—perfect for entertaining, snacking, or serving alongside soup and salad. The sourdough adds tang and chew, while the black garlic and miso create deep, complex flavors that linger on the palate.
- Prep
- 12 min
- Cook
- 15 min
- Wait
- 3 min
- Total
- 30 min
- Makes
- About 40 crackers (4 oz / 115 g total)
Steps
Before you start
- Preheat oven to 375°F (190°C) with a rack in the upper third
- Measure out sourdough discard at room temperature
- Line two large baking sheets with parchment paper
Mix the cracker dough
- In a small bowl, whisk together the sourdough discard (1 cup / 240 ml), miso paste (2 tbsp / 30 g), black garlic paste (3 tbsp / 30 g), and toasted sesame oil (1 tbsp / 15 ml) until fully combined and smooth.
- The mixture should be thick and spreadable, similar to peanut butter.
- Stir in the all-purpose flour (2 tbsp / 15 g) and mix until no streaks of flour remain.
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Ready when: dough is smooth and uniform with no streaks of flour
Tip: Make sure the miso paste is fully incorporated—break up any lumps with the back of a whisk to avoid grainy crackers.
Spread onto parchment
- Divide the dough between the two prepared baking sheets.
- Using a rubber spatula (or a lightly oiled offset spatula), spread the dough in a very thin, even layer across each sheet, aiming for about ⅛ inch (3 mm) thick.
- It's okay if the layer is slightly irregular at the edges.
- Leave a small margin from the edges of the pan so the crackers have room to crisp up.
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Ready when: dough is spread evenly and thin across the sheet
Tip: If the dough is too thick, the crackers will be chewy rather than crispy. Spread slowly and gently; a bench scraper works well for this.
Season and score
- Lightly brush or mist the top of each dough layer with a tiny bit of water if desired (this helps toppings stick).
- Sprinkle generously with fleur de sel or fine sea salt.
- If using sesame seeds, scatter them evenly over the top.
- Optional: crumble the nori sheet into fine pieces and sprinkle over the dough.
- Using a sharp knife or pizza cutter, gently score the dough into small crackers about 1.5×2 inches (4×5 cm)—don't cut all the way through; just score enough for easy breaking later.
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Ready when: toppings are evenly distributed and crackers are scored
Tip: Light scoring now makes it much easier to break the finished crackers into neat pieces without shattering them.
Bake until golden and crispOven 375°F / 190°C
- Place both baking sheets in the preheated 375°F (190°C) oven, with one on the upper-middle rack and one on the lower-middle rack.
- Bake for 12–15 minutes, checking around the 12-minute mark.
- The crackers are done when they are golden brown, edges are darker, and they feel completely dry to the touch.
- Rotate the sheets halfway through baking (top to bottom) if you notice uneven browning.
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Ready when: crackers are golden brown, edges are dark, and they feel completely dry and crisp
Tip: If the crackers still look glossy or feel soft, add another 1–2 minutes. Overbaked is better than underbaked for crackers—they continue to firm up as they cool.
Cool and break apart
- Remove the baking sheets from the oven and let the crackers cool on the pan for 2–3 minutes until they firm up slightly but are still warm (this makes them easier to break cleanly).
- Using your hands or a gentle knife, break the crackers along the score lines into individual pieces.
- Transfer to a wire rack or serving plate and allow to cool completely for about 1 minute before serving.
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Ready when: crackers are broken into individual pieces and completely cooled
Tip: If the crackers have cooled completely on the pan and become too brittle to break cleanly, return them to a 350°F (175°C) oven for 30 seconds to soften slightly, then break.
Good to know
Tips
- Make sure your sourdough discard is at room temperature and fed within the last 4–6 hours so it has good structure; very old or very young discard may yield thin, fragile crackers.
- Black garlic is sweeter and less pungent than raw garlic—don't substitute with garlic powder, which will taste sharp and unpleasant in these delicate crackers.
- For extra crispness, use a pizza cutter or pastry wheel to score and cut; it applies even pressure and prevents tearing.
- These crackers are best served the day they're made, while they're at peak crispness. They make an elegant appetizer alongside cured fish, soft cheese, or a light miso soup.
Storage & reheating
Store in an airtight container at room temperature for up to 5 days (for best crispness, store in a container lined with paper towels to absorb any moisture). Not recommended for freezing, as the texture may become soft upon thawing. If crackers lose crispness, reheat on a baking sheet at 300°F (150°C) for 3–4 minutes.
Substitutions
- black garlic, finely minced or mashed into a paste → Regular garlic, minced and lightly caramelized, mixed with a pinch of soy sauce (about 3 tbsp garlic plus 1 tsp soy sauce). Regular garlic lacks the sweet, molasses-like depth of black garlic but provides a similar savory note when caramelized. The umami is less complex but still pleasant.
- white or yellow miso paste → 1½ tablespoons soy sauce plus 1 teaspoon fish sauce (or tamari for vegetarian). This creates a more salty, oceanic umami. Reduce added salt in the topping slightly to avoid over-salting.
- toasted sesame oil → Neutral oil like grapeseed or sunflower oil (1 tbsp), plus ½ teaspoon white sesame paste for flavor. Toasted sesame oil adds distinct flavor; this substitute provides fat but less aroma. Increase sesame paste if you want more sesame flavor.
- sourdough discard, at room temperature → 1 cup (240 ml) thick pancake batter or 1 cup all-purpose flour mixed with ¾ cup water plus 1 tsp vinegar and ½ tsp salt. Sourdough discard adds tang and open crumb. This substitute yields milder, less tangy crackers.
