Vegan Confetti Cake

Ingredients

• 3 cup(s) all-purpose flour
• 1 1/2 cup(s) white sugar
• 1 tablespoon(s) baking powder
• 1 teaspoon(s) salt
• 1 1/4 cup(s) plant-based milk ((such as soy or almond))
• 2/3 cup(s) light oil ((such as canola or vegetable))
• 1 tablespoon(s) vanilla extract
• 3/4 cup(s) aquafaba (the liquid in a can of chickpeas)
• 1/2 teaspoon(s) cream of tartar
• 1/3 cup(s) vegan sprinkles ((plus more for decoration))
• 1/2 cup(s) vegan butter
• 1/2 cup(s) vegetable shortening
• 3 cup(s) powdered sugar
• 1 teaspoon(s) vanilla extract
• 1 - 4 tablespoon(s) plant-based milk ((such as soy or almond))