Preheat your oven to 350°F (175°C).
Line your cupcake pan with paper liners.
In a large mixing bowl, whisk together the gluten-free all-purpose flour, granulated sugar, baking powder, baking soda, and salt.
In another bowl, cream the softened unsalted butter until smooth and fluffy. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
Gradually add the dry ingredients to the wet ingredients, alternating with the milk, until everything is combined.
Divide the batter evenly among the cupcake liners, filling each about two-thirds full.
Bake for 18-20 minutes, checking for doneness with a toothpick.
Allow the cupcakes to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.