Preheat your oven to 350° F Grease and parchment line as many 7" cake pans as you have, but you will need 8 layers total
First combine the vegetable oil with the melted vegan butter add the vanilla extract & set aside
Combine the soy milk with the vinegar & let stand for 5 minutes to thicken.
Sift all the dry ingredients together in a large mixing bowl, including the sugar.
Pour the plant milk mixture & the butter/oil mixture into the dry ingredients & whisk smooth
Divide the batter 170g in each pan & bake for approximately 12 minutes at 350°F or until they are lightly golden browned
If you don't have 8 pans, it's ok the remaining batter can sit on the counter at room temperature while the other cakes bake
Once the cakes are done, cool them slightly them carefully flip them out onto a parchment paper or cooling rack & quickly clean, re-grease & re-parchment the pans to bake the remaining batter
YOU WILL HAVE JUST ENOUGH FOR THE 8th layer, it may be slightly thinner but that;s OK~ it's for the caramel layer anyway
Once the cakes are all baked, cool them completely then refrigerate the layers so they get cold & firm (it's easier to handle them when they are cold)
Prepare your chocolate buttercream recipe as per the instructions on that page
Build your cake with 7 of the cake layers & about ¼ cup of chocolate buttercream per layer, then crumb ice it & give it a final ice with the remaining buttercream.*I had about 2 cups of buttercream leftover after I made this entire cake Once the cake is fully iced, prepare the caramel.
Combine the water, vinegar & sugar together in a heavy bottom sauce pot & stir to dissolve the sugar over medium to high heat. Once the mixture begins to boil DO NOT STIR
Bring to a full boil and watch it closely for caramelization
As soon as the sugar starts to turn light amber it will go to burnt very quickly!
Remove from the heat & it will darken in color & continue cooking!
Let it stand for 5 minutes to settle down then using a metal ring mold pour the hot caramel into the mold over the last layer of cake
Let it set for about 5 minutes then using an oiled knife, cut the caramel cake into 12 portions
Decorate each slice of cake with a caramel cake shard