Gather all ingredients and allow unsalted butter to soften for about 30 minutes. Preheat oven to 350°F (175°C).

Beat the softened butter until light and fluffy. Gradually mix in powdered sugar and vanilla extract until creamy.

In a separate bowl, whisk together all-purpose flour, salt, orange zest, and lemon zest.

Combine wet and dry ingredients, stirring gently until just mixed, avoiding overmixing.

Shape dough into balls and place on a baking sheet lined with parchment paper, spaced 2 inches apart.

Lightly sprinkle each cookie ball with granulated sugar.

Bake in preheated oven for 10-12 minutes until edges are light golden brown. Centers should remain soft.

Let cookies cool on the baking sheet for about 5 minutes before transferring to a wire rack to cool completely.