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

In a mixing bowl, combine the dry ingredients: sugar, flour, baking powder, and salt. Mix well and set aside.

In a separate bowl, whisk together the wet ingredients: egg, milk, melted butter, and pure vanilla extract until well combined.

Slowly pour the wet mixture into the dry mixture and stir until a soft dough forms.

Roll the dough on a lightly floured surface to about 1/2 inch thick.

Use a donut cutter to cut out the donuts and place them on the prepared baking sheet, leaving some space between each donut.

Bake for about 10 minutes in the preheated oven or until the donuts are lightly golden brown.

While the donuts cool, prepare the vanilla glaze by mixing powdered sugar, milk, and vanilla extract in a bowl until smooth and pourable. Adjust milk or sugar as needed for desired thickness.

Once the donuts have cooled for about 20 minutes, dip the tops of each donut in the vanilla glaze, allowing the excess to drip off.

Place the glazed donuts on a wire rack to set for about 10 minutes.

While the glaze is still sticky, feel free to add toppings like sprinkles, chopped nuts, mini chocolate chips, or an extra drizzle of glaze.