Combine all the ingredients except for the vanilla extract and the vegan butter in a medium sauce pot over medium to high heat and bring to a boil stirring constantly to avoid scorching the bottom .
Once it starts to bubble remove from the heat and add the vegan butter and vanilla extract and stir until melted and smooth.
Recipe by Gretchen's Vegan Bakery at https://www.gretchensveganbakery.com/berry-cream-pie/