First prepare the dough by adding a pinch of sugar to the plant milk then add the dry yeast and whisk smooth Let stand for 5 minutes and the yeast will get frothy and prove that it is alive.
Combine the flour, sugar, spices & salt in a large mixing bowl OR the work bowl of your stand mixer and whisk to combine evenly
Once the yeast is frothy add to the flour mixture along with the aquafaba or the other measure of plant milk & start mixing with a spatula by hand OR with a dough hook attachment for your electric mixer
Mix just to combine everything together, about 1 minute or so & you will have a shaggy looking dough
At this point if you are mixing by hand turn it out onto the table & knead it together until it forms a smooth pliable dough ~ adding a tablespoon of flour as needed no more than 1/4 cup total *see video tutorial
Otherwise if you are mixing with the electric mixer ~ mix on medium speed for approximately 5 minutes
Now add the softened butter a little bit at a time continuing mixing until it all gets incorporated
Place the dough into a lightly greased bowl, cover & let riser in a warm spot for an hour or more depending on the temperature in your room *This dough will rise slightly but will not double in size
Meanwhile prepare the optional cheese filling by combining the vegan cream cheese with the super soft vegan butter, the sifted confectioners sugar & cornstarch gently with a spatula in a medium sized mixing bowl
Add the vanilla extract & fold together~ reserve in the refrigerator until needed
Combine the brown sugar with the cinnamon ~ reserve until needed
Once the dough has risen gently take a piece of the dough & pull it up stretching it to develop the gluten, go around the bowl doing this on all edges of the dough (4x) as it stretches gently & release the excess gasses.
Now turn it out onto a lightly floured table & press it out to a rectangle shape then roll it to 12" x 18" (the same size as a half sheet pan)
Spread the cold cheese filling over the dough & then sprinkle withe cinnamon sugar
Roll it up like a cinnamon bun ~jelly roll style from the long edge rolling towards you and place onto a parchment lined half sheet pan forming a circle & sealing the edges together
Make snips or cuts with a sharp knife around the dough on top for steam vents then place in a warm spot again to rise ~approx 1 more hour
Once the King Cake has risen after an hour or so~ Preheat the oven to 350F
Brush with your favorite vegan egg wash & bake for approx 35-40 minutes until golden brown & the dough temperature inside is 190F
Remove from oven ~ cool & then glaze with the 3 colors of sugar glaze, by dividing the confectioners sugar between 3 small bowls, add 1 Tablespoon of plant milk & the vegan food color to each bowl & mix smooth~ adjust the consistency with more plant milk if needed