Layer your dry ingredients in the mason jar in the following order: salt, nutmeg, cinnamon, baking soda, baking powder, flour, coconut sugar, oatmeal, cranberries, and walnuts.
Be sure to press the ingredients down to compact them as you go, otherwise you will not be able to fit everything in the jar!
Do NOT add water or banana to the jar.
Screw on the lid and add a label with the following instructions.
Preheat oven to 350 degrees Fahrenheit.
Line a baking sheet with parchment paper.
Mix mashed banana and water in a large mixing bowl.
Add dry ingredients from the jar into the mixing bowl and mix ingredients together with your hands until a dough forms.
Shape the dough into 2 tbsp balls and place 1-2” apart on the lined baking sheet.
Use a fork to press the dough balls down into your desired cookie shape.
Bake for 10-12 minutes.
Cool for 5 minutes and enjoy!