Wash the banana peppers thoroughly under cold water. Slice each pepper in half lengthwise and remove the seeds using a small spoon or your fingers. This will reduce the heat and make them more enjoyable to eat.

In a mixing bowl, combine the sifted all-purpose flour, garlic powder, onion powder, paprika, salt, and black pepper. Whisk together until well mixed.

In another bowl, whisk together the buttermilk and beaten egg until fully combined. This mixture will help the batter adhere to the peppers.

Gradually add the wet mixture to the dry ingredients, stirring gently until just combined. Be careful not to overmix; a few lumps are okay. The batter should be thick enough to coat the back of a spoon.

In a deep fryer or large, heavy-bottomed pot, heat the vegetable oil over medium-high heat until it reaches 350°F (175°C). Use a thermometer to check the temperature; this is crucial for achieving a crispy texture.

Carefully dip each banana pepper half into the batter, ensuring it is fully coated. Allow excess batter to drip off.

Using tongs, gently place the battered banana peppers into the hot oil, being careful not to overcrowd the pot. Fry in batches if necessary.

Fry the peppers for about 3-4 minutes on each side, or until they are golden brown and crispy. The oil temperature may drop slightly; adjust the heat as needed to maintain 350°F.

Once cooked, use tongs to remove the peppers from the oil and place them on a plate lined with paper towels to absorb excess oil.

Serve the crispy fried banana peppers hot, with your favorite dipping sauce, such as ranch or marinara. Enjoy the crunchy texture and sweet, mild flavor!