To prepare a vegan rainbow carrot cake recipe, first you need to gather your ingredients. First, you'll need the following ingredients: 1 cup (240 g) rolled oats 2 tablespoons (120 ml) coconut oil 1 tablespoon (60 ls) maple syrup 12 teaspoon (0.5 tsp) vanilla extract Instructions: Preheat the oven to 375 ?F (190?C) and grease and flour two 8-inch round cake pans. Sift the flour, baking powder, salt, and baking soda into the bowl of an electric mixer. Add the wet ingredients to the dry ingredients and mix on medium speed until the batter is smooth. Pour in the carrots and stir to combine. Bake the cake for 35 to 40 minutes, or until it's just set. Allow to cool before serving.