Tarte tropézienne

Develop the brioche dough. Mix 300 g flour, 70 ml milk, 100 g egg, 40 g sugar, 5 g salt, 6 g yeast and 15 ml orange-flower water, then knead until the dough becomes elastic before gradually working in 100 g soft butter. Timing: 20 minutes. Developing gluten before all the butter is absorbed gives the enriched dough enough strength. Use pasteurised egg and milk. The dough is glossy, elastic and stretches to a thin membrane without tearing immediately.

Give the dough its first rise. Rest the covered dough for its first rise. Timing: 90 minutes. Heat: warm room temperature. Temperature: about 24–26 °C room. The first rise builds gas and flavour in the enriched dough. The dough has roughly doubled in volume and holds a clear fingertip indentation that relaxes slowly.

Shape the round. Press out large gas pockets, shape a 22 cm round on a lined tray and allow 10 minutes of active shaping. Timing: 10 minutes. Even shape makes the finished split cake level enough to fill. The round is an even 22 cm with a level surface and no tight torn skin.

Complete the final proof. Rest the shaped brioche for its final rise. Timing: 45 minutes passive proofing. Heat: warm room temperature. Temperature: about 24–26 °C room. The final rise keeps the crumb light enough to sandwich the cream. The brioche is visibly puffy and a light fingertip press springs back slowly.

Bake with pearl sugar. Brush with 15 ml milk, scatter 35 g pearl sugar and bake until evenly golden and cooked through. Timing: 25 minutes. Heat: 175 °C conventional oven. Temperature: 175 °C. Moderate oven heat cooks the enriched crumb without scorching the sugar. Use oven gloves around the hot tray. The brioche is evenly deep golden, feels light for its size and the centre is set rather than gummy.

Cool the brioche completely. Transfer the brioche to a rack and cool completely before splitting. Timing: 60 minutes. Keep off the heat. Warm brioche would melt the filling. Do not fill while the brioche is warm. The brioche is completely cool through the centre and no warm steam escapes when it is cut.

Cook the pastry cream. Heat 300 ml milk; whisk 36 g yolk, 60 g sugar and 25 g cornflour separately, temper with the hot milk, return to the saucepan and cook while whisking until the custard reaches 71 °C and thickens. Whisk in 50 g butter and 10 ml orange-flower water. Timing: 10 minutes. Heat: medium heat. Temperature: 71 °C custard centre. Cornflour thickens the custard while 71 °C provides the egg safety endpoint. Keep the custard moving to prevent scorching and verify 71 °C with a clean thermometer. The custard is thick enough to hold whisk trails and reaches 71 °C throughout.

Chill the custard rapidly. Spread the custard in a shallow clean container, cover the surface and cool it rapidly in the refrigerator. Timing: 120 minutes concurrently with proofing, baking and brioche cooling. Temperature: 4 °C or colder. Rapid shallow cooling limits time in the temperature danger zone. Refrigerate promptly at 4 °C or colder. The custard is cold throughout and no warmer than 4 °C before finishing.

Finish the lightened cream. Bring the cold custard and the remaining 50 g butter separately to 18–20 °C for 20–30 minutes, beat the butter smooth, then whip it into the custard; whip 150 ml cold cream to soft peaks and fold it in. Timing: 20 minutes active within a 20–30 minute tempering interval. Temperature: 18–20 °C for custard and finishing butter; cream kept cold. Matching the custard and butter temperatures reduces the risk of a split mousseline. The combined room-temperature tempering for custard and butter stays within the 2-hour cumulative limit; return the cream to refrigeration immediately after mixing. The custard and finishing butter are both 18–20 °C before beating, and the finished cream is smooth, aerated and holds soft ridges.

Fill and set the cake. Split the cooled brioche horizontally, spread all the cream evenly over the lower half, replace the top and refrigerate before slicing. Timing: 60 minutes. Temperature: 4 °C or colder. A chilled set stabilises the generous filling. Keep the filled cake at 4 °C or colder. The cream has set enough to hold a clean slice after 60 minutes of refrigeration.