01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together the flour, baking powder, and salt until evenly blended.
03 - In a large mixing bowl, cream the butter and 1 cup sugar until light and fluffy, about 2–3 minutes.
04 - Add the egg, vanilla extract, orange zest, and orange juice. Beat until well combined and smooth.
05 - Gradually add the dry ingredients to the wet mixture, mixing just until incorporated. Do not overmix.
06 - In a small bowl, combine the 1/4 cup sugar and 1 tsp orange zest for rolling.
07 - Scoop tablespoonfuls of dough and roll into balls. Roll each ball in the orange sugar mixture to coat evenly.
08 - Place balls 2 inches apart on prepared baking sheets. Press gently to flatten slightly.
09 - Bake for 10–12 minutes, until the edges are just golden. Let cookies cool on baking sheet for 5 minutes, then transfer to a rack to cool completely.