Butter Cookies

§ PROCEDURE

1. In a large bowl, combine 190 g room-temperature butter and 150 g sugar. Whisk until fully combined and uniform.
2. Add 1 egg, ½ tsp vanilla extract, and the lemon zest if using. Whisk until the mixture is smooth and everything is incorporated.
3. In a separate bowl, whisk together 300 g all-purpose flour and 18 g baking powder until evenly mixed.
4. Add the dry ingredients to the wet bowl. Mix until fully integrated and a soft, manageable dough forms.
5. Lightly flour a clean work surface. Turn the dough out and roll it by hand into a smooth cylinder. Aim for about 2 inches in diameter for bite-sized cookies — a wider cylinder gives larger cookies, narrower gives smaller ones.
6. Using a bench scraper or sharp knife, slice the cylinder into rounds at 1-inch intervals.
7. Pour some sugar onto a flat plate. Dip the top face of each cookie round into the sugar and press lightly so it adheres. Place the cookies sugar-side up on a parchment-lined baking sheet, leaving about 1 inch of space between each. If using lemon marmalade, add a small drop to the center of each cookie.
8. Bake at 400°F (200°C) for 10 minutes, until the edges just begin to turn golden. The centers will look pale — that is correct.
9. Let the cookies rest on the baking sheet for 5 minutes before transferring to a cooling rack. They are fragile straight from the oven and firm up as they cool.

§ OBSERVED RESULT

The cookies emerge with a pale, buttery body and lightly browned edges. The sugar on top forms a faint crystalline crust where it caught the heat. The interior is soft and tender — closer to shortbread than a cookie that spreads. Earth specimens consumed them without pausing between. I have classified this as a reliable outcome.