Melt white chocolate in make-shift double boiler or microwave. Allow to cool slightly.
Add food coloring then fill icing bags with the chocolate. I used a Wilton #8 tip.
Make straight and squiggle lines on parchment paper. Sprinkle with sparkling sugar before the chocolate hardens.
CUPCAKES
Preheat oven to 350 degrees F.
Place liners in cupcake pans, set aside.
With a hand or stand mixer, beat butter on medium speed until creamy.
Add sugar and coconut oil, beat until well combined and creamy. Scrape sides of bowl, then mix in vanilla extract.
In separate bowl, whisk together flour, baking powder and salt.
On medium speed, add part of the flour mixture and milk, alternating until all ingredients are added and combined.
In separate bowl, beat egg whites with a hand mixer on high-speed until stiff peaks form.
With a spatula, gently fold egg whites into the batter. Scrape down the sides of the bowl, combine ingredients well but do not over mix.
Spoon batter into cupcake liners.
Bake at 350 degrees F for 25 minutes depending on your oven.
Inserted toothpick should come out almost completely clean. Cupcake tops should be lightly golden brown when baking is complete. Move cupcakes to cooking rack.
After cupcakes are completely cool, decorate with buttercream frosting, sprinkles and white chocolate accents.
Notes
You may replace refined coconut oil with canola, or other vegetable oil.