Preheat your oven to 350F. Grease 2 or 3 8 x 12 inch baking pan and set aside.
Shred your carrots and keep aside
Make buttermilk by mixing apple cider vinegar with your milk
Create your flax egg and keep aside.
Combine your dry ingredients together in a bowl
Whip your coconut oil, sugar, apple sauce together in a separate bowl
Add in flax egg and buttermilk and mix well with your wet ingredients bowl
Slowly add in your flour mixture and mix.
Fold in your grated carrots and walnuts
Divide batter between 2-3 cake pans.
Bake for 45-55 minutes depending on thickness of cake. Check with a toothpick
Let it cool completely and place into the fridge overnight or for two hours. This always frosting to be smooth and not break the cake.