In a large mixing bowl, whisk together 2 cups of all-purpose flour, 2 teaspoons of baking powder, 1 teaspoon of baking soda, ½ teaspoon of salt, and ¼ cup of granulated sugar until well incorporated.

In a separate bowl, whisk together 2 eggs, 1 cup of buttermilk, ¼ cup of melted unsalted butter, and 1 teaspoon of vanilla extract.

Pour the wet mixture into the dry ingredients and fold the batter with a spatula until just combined.

Cover the bowl with a kitchen towel and let the batter rest for 10-15 minutes.

Heat vegetable oil in a deep pot over medium heat until it reaches 350°F (175°C).

Line a baking sheet with paper towels to absorb excess oil.

Transfer the batter into a piping bag or zip-top bag with a corner snipped off.

Pipe or drop the batter into the hot oil, forming 2-3 inch circles.

Fry the donuts for 2-3 minutes on each side until golden brown.

Use a slotted spoon to remove the donuts from the oil and drain on paper towels.

In a medium bowl, whisk together 1 cup of powdered sugar, 2 tablespoons of milk, and ½ teaspoon of vanilla extract to make glaze.

Dip each donut into your preferred glaze and allow excess to drip off.

Sprinkle your favorite toppings onto the glazed donuts.

Allow the glaze to set on a cooling rack for 15-20 minutes.

Serve warm and store any leftovers in an airtight container.