In a bowl, combine the flour, coconut blossom sugar, vanilla powder, and baking powder.
Mix the water and soy flour together in a separate bowl until smooth.
Add the water-soy flour mixture and vegetable oil to the dry ingredients, stirring until you have a smooth dough.
Lightly grease a springform pan, then pour in the dough.
Bake for 15 to 25 minutes, depending on your oven and browning preference, until the top is golden brown.
Let the base cool completely before removing from the pan. Once cooled, use as the foundation for fruit cakes—you can add additional toppings like vegan custard, fresh fruit, and cake icing, then refrigerate for 1 to 2 hours before serving.