Preheat oven to 340F, grease the bottom of two 8” square pans and line the bottom of the pan with parchment paper.
In a large measuring cup, pour the heavy cream, eggs, vanilla paste, and apple cider vinegar mix to incorporate.
In a bowl of a standing mixer, measure the flour, baking powder, and sugar. Use the paddle attachment to mix the ingredients on low.
Stop the mixer, then add the oil and butter, then mix on low until the butter and oil have been incorporated into the dry mixture and you have a moist mixture that resembles wet sand.
With the mixer on medium-low speed, pour the wet mixture into the flour mixture and mix until the ingredients are well combined, and you have a thick batter.
Divide the batter between the greased pan (each about 750g) and bake for 33-37 minutes or until a toothpick comes out with a few moist crumbs from the center of the cake.
Remove from the oven and let cool completely before decorating.