Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine the whole wheat flour, rolled oats, and cinnamon. Mix well to ensure the dry ingredients are evenly distributed.

In another bowl, whisk together the applesauce, honey, plain yogurt, and egg until smooth and well combined.

Gradually pour the wet mixture into the dry mixture, stirring until a dough begins to form. If the dough is too dry, add water a tablespoon at a time.

Knead the dough with your hands until it is smooth and no longer sticky.

On a floured surface, roll out the dough to about 1/4-inch thickness using a rolling pin.

Use cookie cutters to cut out shapes from the rolled dough and place them on the prepared baking sheet.

Bake in the preheated oven for 20-25 minutes or until the cookies are lightly golden and firm to the touch.

Remove from the oven and let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.