Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, whisk together the all-purpose gluten-free flour, dark brown sugar, baking powder, baking soda, and salt.

In a separate bowl, mix the oil, non-dairy milk, and vanilla extract until fully blended.

Gradually stir the wet ingredients into the dry mixture using a spatula or wooden spoon until a dough forms.

Scoop out portions of cookie dough, roll them into balls, and roll each ball in granulated sugar.

Place on the prepared baking sheet, leaving about two inches between cookies.

Bake for 10 minutes until edges are golden and centers look soft.

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