Prepare the Dough: In a large bowl, combine the flour, baking powder, and salt. Gradually add the water (or milk), mixing until a dough forms. Knead the dough for 5 minutes until smooth and elastic.
Shape the Dough: Divide the dough into 6-8 portions. Roll each portion into a ball and flatten it into a circle about 1/4 inch thick. You can shape them into rounds, triangles, or squares.
Heat the Oil: Heat about 2-3 inches of vegetable oil in a frying pan over medium heat. To test if the oil is ready, drop a small piece of dough in. If it sizzles and rises to the top, the oil is hot enough.
Fry the Dough: Carefully place the flattened dough pieces into the hot oil. Fry for about 2-3 minutes per side, or until golden brown and crispy. Use tongs to turn them as needed.
Drain and Serve: Once fried, remove the fry jacks and place them on paper towels to drain excess oil. Serve them hot with your favorite toppings like scrambled eggs, beans, cheese, or honey.