Crispy Matcha Cruffin with White Chocolate Ganache Step-by-step instructions

Before you start

Before starting, ensure the puff pastry is thawed according to the package instructions—usually in the refrigerator overnight. Take the butter out to soften, and measure all ingredients. You'll need a deep muffin tin; grease it thoroughly with butter or nonstick spray to prevent sticking.

Set up a work surface with a rolling pin, pastry brush, and a sharp knife. Have a small saucepan ready for the ganache and a piping bag or zip-top bag for filling. If you plan to chill the cruffins overnight, make sure you have space in the refrigerator. The resting time is crucial for the layers to develop, so don't skip it.

Instructions

Phase 1: Dough and Spirals

1. 1Prepare the Dough and Sugar
   On a lightly floured surface, roll the thawed puff pastry into a rectangle about 1/4 inch thick. Brush the entire surface with the softened butter, covering evenly. Sprinkle 2 tablespoons of the matcha sugar over the butter. Using a sharp knife or pizza cutter, slice the dough into 6 long strips, each about 2 inches wide.
   Look for The dough should be smooth and the butter evenly spread without tearing.
   Tip If the dough becomes too soft, chill it for 10 minutes before slicing.
2. 2Shape the Spirals
   Take one strip of dough and roll it tightly into a spiral, keeping the layers even. Place the spiral upright in a well-greased deep muffin tin cup. Repeat with the remaining strips. Cover the tin loosely with plastic wrap and let the cruffins rest in the refrigerator for at least 2 hours, or overnight for a deeper rise.
   Look for The spirals should be tight and uniform, with the seam tucked underneath.
   Tip Chilling the shaped cruffins firms the butter, which helps create distinct flaky layers.

At the end of this phase, you should have six neat spirals sitting in the muffin tin. The dough should be cool to the touch, and the spirals should be tight and uniform. If any spirals have loosened, gently re-roll them.

The butter should be visible between the layers, but not oozing out. Cover the tin and refrigerate—this is the perfect time to clean up your workspace and prepare the ganache ingredients. The cruffins can rest here for up to 24 hours, so you can break up the steps if needed.

Phase 2: Baking and Coating

3. 3Bake the Cruffins
   Preheat the oven to 380°F (193°C). Remove the cruffins from the refrigerator and let them sit at room temperature for 15 minutes while the oven heats. Bake for 20 minutes, or until the tops are deep golden brown and crisp. The internal temperature of the cruffins should reach 160°F (71°C) to ensure the eggs in the pastry are fully cooked.
   Look for The cruffins will puff dramatically and the spiral layers will separate slightly.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Rotate the pan halfway through baking for even browning.
4. 4Coat in Matcha Sugar
   While the cruffins are still warm, carefully remove them from the tin and toss them in the remaining matcha sugar until fully coated. Let them cool completely on a wire rack. The sugar will stick to the buttery exterior, creating a sweet, slightly bitter crust.
   Look for The coating should be even and the sugar should adhere without melting.
   Tip Toss gently to avoid breaking the delicate layers.

The kitchen will smell like butter and toasted matcha as the cruffins bake. When they come out of the oven, they should be puffed high, with distinct spiral ridges and a deep golden-brown color. The sugar coating will create a sparkly, crackly crust that sticks to your fingers. Let them cool completely on a wire rack—this ensures the interior is fully set and the coating stays crisp. The ganache can be made while they cool, so the timing works perfectly.

Phase 3: Ganache and Filling

5. 5Make the Ganache
   Place the chopped white chocolate in a heatproof bowl. In a small saucepan, heat the heavy cream and matcha powder over medium heat until just simmering. Pour the hot cream over the white chocolate and let it sit for 1 minute. Stir slowly until smooth and glossy. Let the ganache cool slightly until it thickens to a piping consistency.
   Look for The ganache should be smooth, shiny, and thick enough to hold its shape.
   Tip If the ganache splits, whisk in a tablespoon of warm cream to bring it back together.
6. 6Fill and Serve
   Using a small knife, hollow out a small well in the center of each cruffin. Transfer the ganache to a piping bag fitted with a small round tip. Pipe the ganache into the wells, filling them generously. Serve immediately, or let the ganache set for 10 minutes for a cleaner bite.
   Look for The ganache should ooze slightly when the cruffin is pulled apart.
   Tip For an extra touch, dust with a little extra matcha powder just before serving.

The ganache should be smooth, glossy, and thick enough to pipe without running. When you pipe it into the cruffins, it should fill the well and stay put, maybe slightly settling. The cruffins are now ready to serve—the contrast between the crispy exterior and the molten center is the ultimate payoff. If you let them sit for 10 minutes, the ganache will set slightly, making them easier to handle, but they're best enjoyed within a few hours.

Common mistakes

One common mistake is overworking the dough, which can cause the butter to soften and the layers to stick together. Keep the dough cold, and if it becomes too soft, return it to the refrigerator for a few minutes. Another pitfall is not chilling the shaped cruffins long enough—this step is essential for the butter to firm up, which creates the flaky layers.

If the cruffins unravel during baking, they weren't rolled tightly enough or the dough was too warm. Finally, be careful not to overfill the ganache—it will spill out during baking if the wells are too deep. Fill them just to the top.

How to tell it’s done

The cruffins are done when they are deep golden brown and feel crisp to the touch—a skewer inserted into the center should come out clean. The internal temperature should reach 160°F (71°C) to ensure the eggs in the pastry are fully cooked. If the tops are browning too quickly but the center is still doughy, loosely tent with foil and continue baking.

After baking, let them cool on a wire rack; they will crisp up as they cool. When you tap the top, it should sound hollow. The ganache is ready when it's smooth and thick enough to pipe—it should hold its shape when lifted with a spoon.

• Egg dishes: 160°F (71°C) in the thickest part