Preheat your oven to 350°F & grease your 9" x 13" cake pan *see notes for other pan sizes
Combine the vinegar with the plant milk (soy milk is the only milk that will thicken with vinegar, but you can use another plant milk of your choice)
In a large mixing bowl combine the oil, brown sugar, salt, pumpkin, and then the thickened vinegar/plant milk and with the vanilla & whisk to combine well
Sift the flour with all the spices & the baking soda then add it all at once to the wet mixture in the bowl ~Whisk smooth
Pour batter into your prepares pans & bake immediately in the preheated 350°F oven for 15 minutes
Then turn the oven temperature down to 300°F and bake for the remaining time *see notes above for exact baking times or when a toothpick inserted into the center comes out clean
Cool in the pan(s) until you can touch it without burning your fingers, then turn out onto a cooling rack to cool all the way
Ice & fill the cake with your favorite icing!