01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together the gluten-free flour, baking powder, and salt in a medium bowl. Set aside.
03 - Beat the softened butter and 1 cup sugar together in a large bowl until light and fluffy, about 2-3 minutes.
04 - Beat in the egg, vanilla extract, orange blossom water, and orange zest until well combined.
05 - Gradually add the dry ingredients to the wet ingredients, mixing just until a soft dough forms.
06 - Scoop tablespoon-sized portions of dough and roll into balls. Roll each ball in the remaining 1/4 cup sugar to coat.
07 - Place the dough balls 2 inches apart on the prepared baking sheets. Gently flatten each ball slightly with your palm or the bottom of a glass.
08 - Bake for 10-12 minutes, or until the edges are just turning golden.
09 - Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.