Gather your mise en place; get together all of the equipment needed for the recipe and gather your ingredients.

Measure out all ingredients. 

Preheat the oven to 375°F.

Remove the core from the apple and cut into a small dice. 

In a bowl combine the all purpose flour, whole wheat flour, salt, baking soda, cinnamon and pumpkin seeds. Mix until combined.

In a separate bowl, combine brown sugar, apple sauce, eggs, vanilla and buttermilk and whisk until well combined. Slowly pour the vegetable oil in while whisking until fully incorporated.

Pour the wet ingredients into the dry ingredients and mix until fully combined. Add the diced apple and stir gently until combined. 

Portion the batter between the 12 muffin cups in a muffin tin. 

Bake in the preheated oven for 20 – 25 minutes or until a toothpick inserted into the center comes out clean. Let the muffins cool on a wire rack.