Add the rolled oats and just-under-boiling water to a small bowl. Stir well to create a soft and thick oatmeal mixture. Using hearty rolled oats helps to prevent over-mushing of the grains. Do not use a quick oat or similar. Set aside.
In a large mixing bowl, cream together the wet ingredients, using a mixer.
Fold in the soft rolled oat + water mixture.
Fold in the dry ingredients to create a cookie dough consistency. Fold in the walnuts and chocolate chips.
Place the dough bowl in the fridge for at least ten minutes. While the dough is chilling, you can preheat the oven to 350 degrees.
Line a baking sheet with parchment paper and scoop the dough into balls. You can do small or large cookies. Baking time will increase a bit if you do super large cookie sizes.
Bake medium sized cookies for 12-15 minutes at 350 degrees. Cookies will be done when the edges start to slightly brown.
Cool cookies on the baking sheet for five minutes, then transfer to a cooling rack and cool for another 10-15 minutes before serving. Leftovers: Wrap in plastic wrap and place in the fridge. They also freeze well!