Mix the dry ingredients: In a large bowl, combine 250 grams of flour, 1 teaspoon of baking powder, and a pinch of salt. Stir to ensure that the dry ingredients are evenly mixed.

Add the butter: Cut 90 grams of cold butter into small cubes and add it to the flour mixture. Using your fingers or a pastry cutter, rub the butter into the flour until the mixture resembles coarse crumbs. You want to avoid overworking the dough so that it remains light and tender.

Add the egg and sugar: In a small bowl, whisk together 1 egg and 40 grams of sugar. Pour this mixture into the flour and butter mixture, and stir with a spoon or your hands until the dough begins to come together.

Form the dough: Once the dough starts to come together, lightly knead it until it forms a smooth ball. Wrap the dough in plastic wrap and chill it in the refrigerator for at least 30 minutes. This will help make the dough easier to roll out and ensure a crisp crust.