Preheat the oven to 350°F & grease & line your cake pans with parchment paper
Combine the flax meal with the hot water & let stand to thicken for 5 minutes
Add the vinegar to the plant milk along with the vanilla extract
Sift the flour with the baking powder & salt set aside
Cream the vegan butter with the sugar until light & fluffy (this may take about 3-5 minutes on medium to high speed) Be sure to scrape the bottom & sides of the bowl to ensure an even mix
Add the flax paste while continuing to mix on medium speed then whip on high speed for 5 seconds to emulsify
Now add about 1/3 of the flour to the creamed mixture while mixing on low speed just until combined, then add half of the milk mixture
Add another 1/3 of the flour & then the remaining milk, then the last amount of flour ~mix just to combine evenly.
Divide the batter evenly amongst the prepared cake pans & bake for approximately 25-30 minutes or until they are springy to the touch when you gently press the centers.Be aware that this cake recipe will not dome or rise very much! I make 3-7" layers that end up being just a tad higher than 1" each! Once the cakes are baked & cooled fill & ice with your favorite combinations!