Preheat the oven to 350°F/175°C and Line muffin pans with cupcake liners (this recipe makes 15-18 cupcakes).
In a medium mixing bowl, mix the dry ingredients.
Add the wet ingredients with the zest or vanilla in a separate bowl and mix well to combine.
Pour the wet ingredients into the bowl with the dry ingredients and mix until combined.
Fill the liners two-thirds full with the batter. Bake for 18-21 minutes, or until a cake tester comes out clean. Allow the cupcakes to cool completely before frosting.
Prepare the frosting and mix it with the food coloring as desired. You will only need about a half cup of frosting for the green leaves. I halved the remaining frosting making pink and white flowers)
Once cooled, pipe the flowers onto the cupcakes (see the post and video for step-by-step instructions).