In a medium bowl, combine whole wheat flour, canned pumpkin, creamy peanut butter, and an egg. Use a whisk or spatula to blend until smooth.

Gradually add water, one tablespoon at a time, kneading the dough until it forms a firm ball.

On a lightly floured surface, roll out the dough to a thickness of approximately 1/4 inch.

Slice the dough into small rectangles or your desired shapes using a pizza cutter.

Preheat your air fryer to 370°F (190°C) and lightly grease the basket.

Arrange the cut rectangles in the greased basket, ensuring space between each piece, and cook for 5-7 minutes.

Once cooked, let the treats cool on a wire rack for about 10 minutes before serving.