Vegan Dollhouse - Rainbow Smash Cake

Ingredients

• 5 tablespoons (~⅓ cup/75g) lemon or lime juice
• 2 cups (260g) all-purpose flour
• ¾ cup (165g) organic, vegan, or raw sugar
• 1 teaspoon (6-7g) baking soda
• large pinch of salt
• ½ cup (125ml/106g) safflower oil
• 1 cup (250ml/265g) nondairy milk
• 2 teaspoons (8g) vanilla extract
• vegan food coloring (see below for the colors and amounts I used)
• ⅓ cup (60g) vegan butter or margarine
• ⅓ cup (64g) organic palm shortening
• 1 teaspoon (4g) vanilla extract
• 1 ½ cups (180g) organic powdered sugar
• 1 teaspoon nondairy milk, room temp