Steps
- Whisk 200g of all-purpose flour, ½ teaspoon of baking powder, and ¼ teaspoon of baking soda.
- Rub 149g of granulated sugar with the zest of 2 lemons. Whisk in 50g of vegetable oil, 28g of melted unsalted butter, 1 teaspoon of vanilla extract, ½ teaspoon of salt, 43g of lemon juice, and 1 large egg.
- Stir in the flour mixture until no dry patches remain. Cover and refrigerate for 2-3 hours, until firm. Near the end, preheat the oven to 350°F / 175°C.
- Line baking sheets with parchment paper. Put 66g of granulated sugar and 75g of icing sugar in separate bowls.
- Scoop 23g portions of dough. Roll each in granulated sugar, then generously in icing sugar. Space apart on the baking sheets.
- Bake for 11-13 minutes, rotating the baking sheets halfway, until edges are firm and centers set. Let cool on the baking sheets.