Matcha Black Sesame Crispy Wafer Chocolate Bars Step-by-step instructions

Before you start

Before starting, make sure the black sesame brittle is at room temperature and the matcha white chocolate block is cold for easier grating. Line a metal tray with parchment paper, leaving some overhang for easy lifting. Have a box grater, a chef's knife, and a rubber spatula ready.

If using a double boiler, fill the bottom pot with an inch of water and bring it to a gentle simmer. If using a microwave, have a microwave-safe bowl ready. Measure the black sesame praline so it's ready to drizzle when the chocolate is melted.

Instructions

Prep and Melt

1. 1Chop the brittle and grate the chocolate
   Place the black sesame brittle on a cutting board and use a sharp chef's knife to chop it into small, crunchy shards. Set aside. Take the solid block of ceremonial matcha white chocolate and grate it on a box grater into a fresh pile of vibrant green curls.
   Look for The brittle breaks into uneven shards; the chocolate curls are bright green and fluffy.
   Tip Keep the chocolate block cold for easier grating and cleaner curls.
2. 2Melt the matcha chocolate
   Place the grated matcha chocolate curls in a heatproof bowl and melt gently over a double boiler or in short bursts in the microwave, stirring frequently until smooth and glossy. Do not overheat.
   Look for The chocolate turns into a thick, emerald-green liquid with no lumps.
   Tip If using a microwave, heat in 20-second intervals and stir between each.

By the end of this phase, the brittle is chopped into small shards, the chocolate is grated into a fluffy pile of emerald curls, and the melted chocolate is smooth and glossy with no lumps. The kitchen smells of toasted sesame and sweet matcha. The grated chocolate should be uniform in size to ensure even melting.

Assemble and Swirl

3. 3Pour the chocolate into the tray
   Line a metal tray with parchment paper. Pour the melted matcha chocolate into the tray and spread it evenly with an offset spatula to create a smooth, level layer.
   Look for The chocolate covers the tray in an even, glossy sheet.
   Tip Tap the tray gently on the counter to release any air bubbles.
4. 4Swirl in the black sesame praline
   Drizzle the dark roasted black sesame praline in ribbons across the surface of the chocolate. Use a knife or spatula to gently swirl the praline into the chocolate, creating a marbled green-and-black pattern.
   Look for The praline forms dark ribbons against the bright green chocolate.
   Tip Do not overmix; keep the ribbons distinct for a striking cross-section.

The melted chocolate is spread evenly in the tray, and the dark praline is drizzled in ribbons across the surface. The swirl pattern is distinct, with clear green and black areas. The tray should be level and the chocolate layer about 1/2 inch thick. The surface is glossy and free of air bubbles.

Chill and Slice

5. 5Chill until set
   Place the tray in the refrigerator and chill until the chocolate is completely firm, about 1 hour. The surface should be set and no longer tacky.
   Look for The chocolate is hard and does not indent when pressed gently.
   Tip Chilling longer makes slicing cleaner and easier.
6. 6Slice into thick bars
   Remove the chilled slab from the tray and place it on a cutting board. Use a sharp chef's knife to slice the slab into thick bars, about 2 inches wide. Wipe the knife clean between cuts for neat edges.
   Look for The bars have clean edges and show the layered cross-section.
   Tip For extra clean cuts, dip the knife in hot water and dry it before slicing.
7. 7Snap and serve
   Lift one bar and snap it cleanly in half to reveal the layered interior: crisp brittle shards and smooth chocolate in a striking green-and-black contrast. Serve immediately or store in an airtight container.
   Look for The bar snaps with a clean break, showing distinct layers.
   Tip Store in a cool, dry place to keep the snap crisp.

After chilling, the slab is firm and lifts easily from the tray. Slicing produces clean, thick bars with a visible cross-section of crisp brittle and smooth chocolate. When snapped, the bar breaks with a satisfying crunch. The bars are ready to serve or store.

Common mistakes

One common mistake is overheating the matcha chocolate, which can cause it to seize or lose its glossy sheen. Always melt gently and stir frequently. Another is overmixing the praline into the chocolate, which turns the marbled pattern into a muddy brown.

Drizzle the praline in ribbons and use a light hand when swirling. Slicing too early can result in ragged edges; ensure the chocolate is fully chilled. Finally, using a dull knife can crush the brittle rather than cut it—always use a sharp chef's knife.

How to tell it’s done

The bars are done when the chocolate is fully set and firm to the touch. After chilling for at least 1 hour, the surface should be hard and not tacky.

When you slice, the knife should glide through with minimal resistance, and the cross-section should show distinct layers of green chocolate and dark sesame ribbons.

The bars should snap cleanly when broken in half, revealing the crisp brittle shards. If the chocolate feels soft or bends, return it to the refrigerator for another 15–20 minutes.