Preheat your oven to 350°F (175°C) and grease a donut pan well to prevent sticking.

In a mixing bowl, whisk together the flour, sugar, baking powder, salt, and 2 teaspoons of ground cinnamon until well combined.

In a separate bowl, beat together the milk, eggs, melted butter, and vanilla extract until the mixture is smooth.

Slowly add the wet ingredients into the dry ingredients, gently mixing until just combined. Be careful not to over-mix; a few lumps are perfectly fine!

Use a piping bag or a Ziploc bag with the corner cut off to pipe the batter into each donut mold, filling them about halfway.

Bake in the preheated oven for about 10-12 minutes or until they are lightly golden and a toothpick comes out clean from the center.

Meanwhile, combine the ½ cup of granulated sugar with 1 tablespoon of cinnamon in a shallow bowl.

Once baked, let the donuts cool for 5 minutes, then toss each one in the cinnamon sugar mixture while still warm.

Pop your warm, sugary donuts onto a wire rack and allow them to cool slightly. Dig in and enjoy the heavenly flavor!