Preheat the oven to 350°F and line a baking sheet with parchment paper.

Lightly steam the broccoli florets until just tender, then cool and finely chop; pat dry with a paper towel.

In a large bowl, whisk together the whole wheat flour, rolled oats, and baking powder.

In a separate bowl, whisk the egg, chicken broth, and peanut butter until smooth.

Pour the wet mixture into the dry ingredients and stir until mostly combined.

Add the chopped broccoli and mix until a soft, slightly sticky dough forms that holds together when pressed.

Lightly flour a work surface, turn the dough out, and knead 4 to 5 times until smooth.

Roll the dough to about 1/4 inch thickness.

Cut into small shapes or bite sized squares with a knife or cookie cutters.

Arrange the pieces on the prepared baking sheet, leaving a little space between each treat.

Bake for 18 to 20 minutes, until the edges are lightly golden and the centers feel firm.

Let the treats cool completely on a wire rack before serving to your dog.