Preheat oven to 350°F. Grease a baking sheet or line it with a silicone mat or parchment paper.

Make a flax egg by combining flaxseed and water in a small bowl. Allow the mixture to sit for 5 minutes.

Place the flax egg, applesauce, and peanut butter in a medium bowl.

Use a hand mixer or a large spoon to combine the wet ingredients.

Add the rice flour and combine well to form a dough.

Turn the dough out onto a smooth surface.

Using your hands, squeeze and combine the ingredients until you have a flat, smooth dough. Flatten the dough evenly with your hands or a rolling pin to about ¼ to ½-inch thickness.

Using a cookie cutter, cut out the dog treats and place them on the prepared baking sheet.

Bake for 12 to 16 minutes.

Transfer the baked treats to a wire rack to cool to room temperature.