Vanilla eggless and dairy-free vegan cake * 1 1/2 cups unbleached all-purpose flour * 1 cup sugar * 1 teaspoon baking soda * 1/2 teaspoon salt * 1/2 cup vegetable oil * 1 cup soy milk * 1 tablespoon vanilla extract * 1 tablespoon vinegar Heat oven to 350 degrees. Line an 8-inch round or square cake pan with parchment paper and grease bottom and sides of the pan. Then flour the pan.