Preheat your skillet or griddle to medium heat.
Lightly oil it to prevent sticking.
Grind the oats in a blender until they become a fine flour-like consistency.
This adds a nice texture to your pancakes.
In a large bowl, mix the ground oats, both types of flour, baking powder, baking soda, and salt.
Make sure there are no lumps.
In another bowl, combine the buttermilk, vegetable oil, and eggs.
Pour this mixture into the dry ingredients.
Stir until just combined, then fold in the chopped walnuts.
Pour 1/4 cup of batter onto the hot skillet for each pancake.
Cook until bubbles form on the surface, then flip and cook until golden brown on the second side.