Preheat your oven to 350F and grease your 2 9-inch cake pans (you can also put parchment paper on them if you'd like)
Combine your almond milk and vinegar, stir then set aside, it will curdle (this creates a vegan buttercream).
Add your dry ingredients and mix. Add your wet ingredients to the bowl and mix with a standing mixer until well combined.
Lower the speed then pour in your boiling water. The batter may be runny, which is fine!
Pour the mixture into your pan and bake for 30-40 minutes.
Let it cool for 15-20 minutes then take out of the pans and let it cool completely before frosting.
Chocolate Frosting
While the cake is baking, combine all ingredients except the apple sauce in a blender (or by hand if you'd like) then add the apple sauce and combine until smooth
Refrigerate for at least 20 minutes then pipe on the cake!