Add 1 cup whole wheat flour and 1 teaspoon baking powder to a large mixing bowl, then mix well.
Add 2 cups chopped kale, 1/2 cup creamy almond butter, 1/2 cup coconut sugar, 1/4 cup cold water, 1 teaspoon vanilla extract, and 1/4 teaspoon salt to a food processor or blender, then blend until smooth.
Transfer the blended kale mixture to the bowl with the whole wheat flour and baking powder, then mix until thoroughly combined.
Chill the cookie dough for 30 minutes.
When the dough has finished chilling, preheat the oven to 350 degrees Fahrenheit.
Use your hands to roll the cookie dough into 12 evenly sized balls and place them, evenly spaced, on a sheet pan lined with parchment paper.
Use your fingers to flatten the cookie dough balls. You can wet your fingers with cold water as needed to prevent the dough from sticking.
Bake at 350 degrees Fahrenheit for 22 minutes or until the edges are lightly golden.
Let the cookies cool to room temperature before removing from the pan and serving.