Preheat the oven to 350F & then grease & parchment your cake pan(s) ~ this recipe will make 3-7" layers or 1 - 9"x13" pan
Combine the vegetable oil with the melted vegan butter add the vanilla extract & set aside
Combine the plant milk with the vinegar & let stand for 5 minutes to thicken. (Soy milk is the only plant milk that will thicken, but you can use another milk if you prefer)
Sift all the dry ingredients together in a large mixing bowl, including the sugar.
Pour the wet ingredients in & whisk smooth, this will be the plant milk mixture & the butter/oil mixture
Pour the batter into the prepared pan(s) & bake immediately in the preheated 350°F oven for 15 minutes, then turn the open temperature down to 325°F to bake the rest of the way, approximately 10-25 minutes more depending on the size pans you are using. When you gently press the centers they should be springy to the touch. Or do the toothpick test for moist crumbs.
Cool in the pan(s) until you can safely touch without burning yourself then turn the cake(s) out onto a cooling rack to cool the rest of the way.
Once completely cooled ice with your choice of icing