Preheat your oven to 325 degrees fahrenheit and grease a 9x5 inch loaf pan, dusting it lightly with a pinch of gluten free flour.
In a medium bowl, whisk together the gluten free all-purpose flour, baking powder, and salt.
In a large mixing bowl, cream the softened butter and granulated sugar together until pale and very fluffy, about 5 minutes.
Add the eggs one at a time, beating well after each. Stir in the vanilla extract.
Turn the mixer to low and alternately add the dry ingredients and the milk, beginning and ending with the flour mixture. Mix just until combined.
Pour the batter into the prepared loaf pan and smooth the top. Bake for 60 to 70 minutes until a toothpick inserted in the center comes out clean. Let cool in the pan for 15 minutes before turning out onto a wire rack.