Chocolate Tuiles

Ingredients

For the recipe

• 50 g unsalted butter
• 70 g caster or superfine white sugar
• 60 g egg whites, from approximately 2 large eggs, at room temperature
• 40 g plain all-purpose flour
• 10 g unsweetened cocoa powder, not drinking chocolate
• 2 teaspoons whole milk (10 ml, approximately 10.3 g)
• 1/2 teaspoon vanilla extract (2.5 ml)
• A small pinch of fine salt, approximately 0.5 g

Instructions

1. Prepare two flat, light-colored baking trays, approximately 40 x 30 cm each, with silicone baking mats or smooth baking parchment. If using parchment, draw four circles approximately 10 cm across on the underside of each sheet as spreading guides, then turn the marked side away from the food. Leave at least 3 cm between circles. Position a rack in the centre of the oven.
2. Set two clean rolling pins or smooth food-safe cylinders, approximately 4-5 cm across, on the work surface so they cannot roll. Cover them loosely with baking parchment. Keep a thin metal palette knife or flexible metal spatula beside them, along with a cooling rack. Prepare this shaping area before any cookies enter the oven.
3. Melt the butter gently in a small saucepan or in short microwave intervals. Remove it from the heat and let it cool until fluid but only lukewarm, approximately 30-35°C / 86-95°F. Do not brown the butter; the recipe uses its full measured weight and moisture.
4. Put the egg whites, sugar and salt in a bowl. Stir with a hand whisk for approximately 1 minute to combine and begin dissolving the sugar. Keep the whisk below the surface and avoid whipping the whites into a foam; excess bubbles make holes in the thin wafers.
5. Sift the flour and cocoa together over the egg-white mixture. Stir gently until no dry pockets remain, scraping around the sides and base of the bowl. Break up any cocoa lumps before continuing so they do not leave thick spots in the finished circles.
6. Stir in the milk and vanilla, then add the lukewarm melted butter in two additions. Mix until the batter is smooth, glossy and spreadable, with no separate layer of butter. Scrape the bowl to ensure the mixture is uniform.
7. Cover the batter and let it rest at room temperature for 20 minutes so the flour hydrates and bubbles settle. Towards the end of the rest, heat the oven to 180°C / 355°F conventional or 160°C / 320°F fan. Stir the batter gently once before spreading; it should be soft enough to smooth into a very thin layer.
8. On the first cool, lined tray, place four portions of batter, approximately 10 g each. Spread each portion with the back of a spoon or a small palette knife into a circle approximately 10 cm across and about 1 mm thick. Make the thickness even from the centre to the edge, without transparent holes or a thick central mound.
9. Bake only one tray at a time for approximately 7-9 minutes. Begin watching at 6 minutes: the surfaces should lose their wet shine and the edges should look dry and set, with a slightly darker rim. Cocoa makes browning harder to judge, so do not wait for a dramatic color change. While the first tray bakes, spread the next four cookies on the second cool tray.
10. Remove the baked tray and immediately slide the thin spatula underneath the first wafer. Lift it while still flexible and drape it over a prepared rolling pin with its baked top facing upward. Gently encourage the sides to follow the curve without pressing or stretching the centre. Shape the remaining wafers promptly, using the second rolling pin as needed.
11. If a wafer becomes too firm to bend before you reach it, leave it flat on the tray and return the tray to the oven for approximately 30-45 seconds. Lift and shape it as soon as it softens again. Do not try to force a cooled wafer around the pin, and watch closely during reheating so the thin edges do not scorch.
12. Leave each shaped tuile on the rolling pin for approximately 45-60 seconds, until it is firm enough to hold its curve, then transfer it carefully to the cooling rack. Handle it near the supported centre rather than squeezing the fragile sides. Once fully cool, a sample should snap rather than bend.
13. Place the prepared second tray in the oven and repeat the baking and shaping process. Let the used tray and its liner cool before spreading another set of circles. Alternate the two trays so one can cool while the other bakes; never spread fresh batter onto a hot tray, where the butter would melt before you can make an even circle.
14. Continue until all the batter is used, making approximately 24 tuiles in six batches of four. Expect approximately 48 minutes of oven time at an average of 8 minutes per batch, plus time for shaping and changing trays. If the first cooled sample is soft in its centre, spread subsequent circles more evenly or bake them a little longer. A soft baked batch can be reheated for 1-2 minutes, watched carefully, and curved again while warm.
15. Let the final batch cool completely on the rack for approximately 15 minutes before storing. Check that every cookie is dry and crisp and that no residual warmth will create condensation inside its container. Tuiles become firmer as they cool; their hot flexibility is what allows them to be shaped.
16. Store the cooled tuiles in a shallow airtight container with parchment between layers and enough room to protect their curves. Serve 2 cookies per portion, giving 12 servings from the batch. If placing them beside ice cream, mousse or another moist dessert, add them immediately before serving so they keep their crisp texture.