Preheat oven to 350ºF. Grease and flour 8" or 9" baking dish.
In a large glass bowl mix together non-dairy milk and apple cider vinegar. Allow to sit for 5-10 minutes.
Add oil, water or orange juice, lemon juice, and vanilla ino milk mixture and stir well.
In a large mixing bowl whisk together flour, sugar, baking powder and salt.
Stir milk mixture into flour mixture until lump free but do not over mix.
In a small bowl combine sprinkles and 1 teaspoon flour and toss to coat.
Pour sprinkles into cake batter and gently stir to distribute.
Pour batter into prepared baking dish. Bake 30-35 minutes or until toothpick inserted into the center comes out clean.
Allow cake to cool in pan for 5 minutes then run a knife around perimeter of cake and invert onto cooling rack.
Cool completely before frosting.