Start by melting 100 g of butter and allowing it to cool. In a mixing bowl, combine 110 g of powdered sugar with the zest of an organic or untreated lemon and a pinch of salt. Add 2 whole eggs and whisk—by hand or with an electric mixer—until the mixture lightens and becomes pale. Sift in 100 g of flour and half a sachet of baking powder, folding gently with a spatula until just incorporated. Stir in the cooled butter quickly to avoid overmixing. Cover and refrigerate the dough for at least 2 hours. This rest is key: it creates the signature 'hump' through thermal shock in a hot oven, a classic technique for authentic madeleines.
Preheat your oven to 210°C (thermostat 7) for at least 15 minutes to ensure it's piping hot. Butter and flour your madeleine molds generously, filling them only partially—the batter expands significantly. For a twist, line with melted chocolate before adding batter. Place in the oven and immediately reduce to 160°C (thermostat 5/6). Bake for about 15 minutes, monitoring closely for a golden finish without over-browning. Unmold onto a wire rack to cool completely, then store in an airtight container. These nostalgic treats reach peak texture the next day—enjoy with tea or coffee.
