Prepare the Cinnamon Sugar Coating:

• In a shallow bowl, mix the granulated sugar and ground cinnamon together. Set aside for coating the donuts later.

Make the Donut Dough:

• In a medium bowl, whisk together the flour, baking powder, baking soda, salt, and ground cinnamon.
• In a separate bowl, beat the eggs and granulated sugar together until smooth.
• Add the buttermilk, melted butter, and vanilla extract to the egg mixture and stir until combined.
• Gradually add the dry ingredients to the wet ingredients, mixing until just combined. The dough will be slightly sticky but thick.

Shape the Donuts:

• Lightly flour your hands and a clean surface. Take a small portion of the dough and roll it into a ball.
• Gently flatten the ball into a disc shape, then use your finger to make a hole in the center of each donut.
• Alternatively, you can use a donut cutter to shape the dough into traditional donut shapes.

Fry the Donuts:

• Heat about 2 inches of vegetable oil in a deep pan or pot over medium heat until it reaches 350°F (175°C).
• Carefully lower the donuts into the hot oil using a slotted spoon or tongs. Fry 2-3 donuts at a time, making sure not to overcrowd the pan.
• Fry the donuts for 2-3 minutes per side, or until golden brown and crisp.
• Remove the donuts from the oil and let them drain on paper towels for a few seconds.

Coat the Donuts in Cinnamon Sugar:

• While the donuts are still warm, roll them in the cinnamon-sugar mixture, making sure they are evenly coated.
• Set the coated donuts on a wire rack to cool slightly before serving.

Serve & Enjoy:

• Serve the donuts warm for the best taste. They’re perfect on their own or with a side of your favorite dipping sauce like chocolate or caramel.